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Human Activity Recognition Using Accelerometer Data

Watch Full Video Here: https://youtu.be/lUI6VMj43PE

source = “Deep Neural Network Example” by Nils Ackermann is licensed under Creative Commons CC BY-ND 4.0

Dataset Link: http://www.cis.fordham.edu/wisdm/dataset.php

The WISDM dataset contains six different labels (Downstairs, Jogging, Sitting, Standing, Upstairs, Walking).

import tensorflow as tf
from tensorflow.keras import Sequential
from tensorflow.keras.layers import Flatten, Dense, Dropout, BatchNormalization
from tensorflow.keras.layers import Conv2D, MaxPool2D
from tensorflow.keras.optimizers import Adam
print(tf.__version__)
2.0.0-rc0
import pandas as pd
import numpy as np
import matplotlib.pyplot as plt
from sklearn.model_selection import train_test_split
from sklearn.preprocessing import StandardScaler, LabelEncoder

Load the Dataset

pd.read_csv('WISDM_ar_v1.1/WISDM_ar_v1.1_raw.txt')
---------------------------------------------------------------------------

ParserError                               Traceback (most recent call last)

<ipython-input-5-da09ba528f48> in <module>
----> 1 pd.read_csv('WISDM_ar_v1.1/WISDM_ar_v1.1_raw.txt')


C:\ProgramData\Anaconda3\lib\site-packages\pandas\io\parsers.py in parser_f(filepath_or_buffer, sep, delimiter, header, names, index_col, usecols, squeeze, prefix, mangle_dupe_cols, dtype, engine, converters, true_values, false_values, skipinitialspace, skiprows, skipfooter, nrows, na_values, keep_default_na, na_filter, verbose, skip_blank_lines, parse_dates, infer_datetime_format, keep_date_col, date_parser, dayfirst, iterator, chunksize, compression, thousands, decimal, lineterminator, quotechar, quoting, doublequote, escapechar, comment, encoding, dialect, tupleize_cols, error_bad_lines, warn_bad_lines, delim_whitespace, low_memory, memory_map, float_precision)
    700                     skip_blank_lines=skip_blank_lines)
    701 
--> 702         return _read(filepath_or_buffer, kwds)
    703 
    704     parser_f.__name__ = name


C:\ProgramData\Anaconda3\lib\site-packages\pandas\io\parsers.py in _read(filepath_or_buffer, kwds)
    433 
    434     try:
--> 435         data = parser.read(nrows)
    436     finally:
    437         parser.close()


C:\ProgramData\Anaconda3\lib\site-packages\pandas\io\parsers.py in read(self, nrows)
   1137     def read(self, nrows=None):
   1138         nrows = _validate_integer('nrows', nrows)
-> 1139         ret = self._engine.read(nrows)
   1140 
   1141         # May alter columns / col_dict


C:\ProgramData\Anaconda3\lib\site-packages\pandas\io\parsers.py in read(self, nrows)
   1993     def read(self, nrows=None):
   1994         try:
-> 1995             data = self._reader.read(nrows)
   1996         except StopIteration:
   1997             if self._first_chunk:


pandas/_libs/parsers.pyx in pandas._libs.parsers.TextReader.read()


pandas/_libs/parsers.pyx in pandas._libs.parsers.TextReader._read_low_memory()


pandas/_libs/parsers.pyx in pandas._libs.parsers.TextReader._read_rows()


pandas/_libs/parsers.pyx in pandas._libs.parsers.TextReader._tokenize_rows()


pandas/_libs/parsers.pyx in pandas._libs.parsers.raise_parser_error()


ParserError: Error tokenizing data. C error: Expected 6 fields in line 134634, saw 11
file = open('WISDM_ar_v1.1/WISDM_ar_v1.1_raw.txt')
lines = file.readlines()

processedList = []

for i, line in enumerate(lines):
    try:
        line = line.split(',')
        last = line[5].split(';')[0]
        last = last.strip()
        if last == '':
            break;
        temp = [line[0], line[1], line[2], line[3], line[4], last]
        processedList.append(temp)
    except:
        print('Error at line number: ', i)
Error at line number:  281873
Error at line number:  281874
Error at line number:  281875
processedList
[['33', 'Jogging', '49105962326000', '-0.6946377', '12.680544', '0.50395286'],
 ['33', 'Jogging', '49106062271000', '5.012288', '11.264028', '0.95342433'],
 ['33', 'Jogging', '49106112167000', '4.903325', '10.882658', '-0.08172209'],
 ['33', 'Jogging', '49106222305000', '-0.61291564', '18.496431', '3.0237172'],
 ['33', 'Jogging', '49106332290000', '-1.1849703', '12.108489', '7.205164'],
 ['33', 'Jogging', '49106442306000', '1.3756552', '-2.4925237', '-6.510526'],
 ['33', 'Jogging', '49106542312000', '-0.61291564', '10.56939', '5.706926'],
 ['33', 'Jogging', '49106652389000', '-0.50395286', '13.947236', '7.0553403'],
 ['33', 'Jogging', '49106762313000', '-8.430995', '11.413852', '5.134871'],
 ['33', 'Jogging', '49106872299000', '0.95342433', '1.3756552', '1.6480621'],
 ['33', 'Jogging', '49106982315000', '-8.19945', '19.57244', '2.7240696'],
 ['33', 'Jogging', '49107092330000', '1.4165162', '5.7886477', '2.982856'],
 ['33', 'Jogging', '49107202316000', '-1.879608', '-2.982856', '-0.29964766'],
 ['33', 'Jogging', '49107312332000', '-6.1291566', '6.851035', '-8.158588'],
 ['33', 'Jogging', '49107422348000', '5.829509', '18.0061', '8.539958'],
 ['33', 'Jogging', '49107522293000', '6.2789803', '2.982856', '2.9147544'],
 ['33', 'Jogging', '49107632339000', '-1.56634', '8.308413', '-1.4573772'],
 ['33', 'Jogging', '49107742355000', '3.5276701', '13.593107', '9.425281'],
 ['33', 'Jogging', '49107852340000', '-2.0294318', '-5.706926', '-10.18802'],
 ['33', 'Jogging', '49107962326000', '2.7649305', '10.337844', '-9.724928'],
 ['33', 'Jogging', '49108062271000', '3.568531', '13.6748295', '1.5390993'],
 ['33', 'Jogging', '49108172348000', '-0.50395286', '3.8681788', '3.718355'],
 ['33', 'Jogging', '49108272262000', '-2.3018389', '1.6889231', '0.08172209'],
 ['33', 'Jogging', '49108382370000', '-3.568531', '19.57244', '6.510526'],
 ['33', 'Jogging', '49108492294000', '-0.8036005', '-3.2961242', '-4.630918'],
 ['33', 'Jogging', '49108602371000', '0.50395286', '10.841797', '13.525005'],
 ['33', 'Jogging', '49108702285000', '5.706926', '15.595298', '6.1700177'],
 ['33', 'Jogging', '49108812332000', '-8.662541', '7.273266', '4.0180025'],
 ['33', 'Jogging', '49108922378000', '-1.334794', '1.2258313', '2.3699405'],
 ['33', 'Jogging', '49109022293000', '-4.5900574', '19.57244', '4.7126403'],
 ['33', 'Jogging', '49109132308000', '3.8681788', '3.759216', '0.84446156'],
 ['33', 'Jogging', '49109242355000', '-1.7978859', '1.5390993', '8.730643'],
 ['33', 'Jogging', '49109352310000', '7.668256', '11.264028', '-1.3075534'],
 ['33', 'Jogging', '49109462295000', '-2.3699405', '14.2877445', '8.281172'],
 ['33', 'Jogging', '49109562271000', '2.7240696', '1.4573772', '0.88532263'],
 ['33', 'Jogging', '49109672348000', '-3.5957718', '18.659876', '-0.6537767'],
 ['33', 'Jogging', '49109782333000', '3.9499009', '4.140586', '3.990762'],
 ['33', 'Jogging', '49109892349000', '0.46309182', '-2.4108016', '2.4108016'],
 ['33', 'Jogging', '49109992263000', '3.7864566', '14.137921', '-3.1463003'],
 ['33', 'Jogging', '49110102371000', '3.336985', '19.231932', '6.5513873'],
 ['33', 'Jogging', '49110212326000', '5.6660647', '3.7864566', '0.53119355'],
 ['33', 'Jogging', '49110263595000', '0.23154591', '0.7627395', '0.7627395'],
 ['33', 'Jogging', '49110372299000', '-4.8216033', '19.57244', '8.158588'],
 ['33', 'Jogging', '49110482345000', '1.8387469', '-1.1168685', '-2.7921712'],
 ['33', 'Jogging', '49110582290000', '-3.2961242', '10.079058', '13.824653'],
 ['33', 'Jogging', '49110692306000', '11.604536', '17.079916', '1.334794'],
 ['33', 'Jogging', '49110802291000', '-3.173541', '14.015338', '5.706926'],
 ['33', 'Jogging', '49110912307000', '0.61291564', '1.1168685', '2.5606253'],
 ['33', 'Jogging', '49111012222000', '-7.8861814', '19.57244', '1.9885708'],
 ['33', 'Jogging', '49111112289000', '3.1463003', '5.243834', '4.671779'],
 ['33', 'Jogging', '49111222305000', '-3.0237172', '-4.3312707', '-3.336985'],
 ['33', 'Jogging', '49111332290000', '-0.08172209', '11.917805', '-7.8861814'],
 ['33', 'Jogging', '49111392257000', '-1.0351465', '14.818938', '4.6036777'],
 ['33', 'Jogging', '49111502304000', '-2.4516625', '2.5333846', '3.486809'],
 ['33', 'Jogging', '49111612289000', '-1.3756552', '2.070293', '-0.19068487'],
 ['33', 'Jogging', '49111722335000', '-2.4925237', '19.57244', '6.469665'],
 ['33', 'Jogging', '49111832290000', '1.4573772', '-5.243834', '-4.372132'],
 ['33', 'Jogging', '49111942337000', '-1.4165162', '9.80665', '5.7477865'],
 ['33', 'Jogging', '49112042282000', '-1.2666923', '14.709975', '6.2108784'],
 ['33', 'Jogging', '49112152297000', '-3.6774938', '3.173541', '3.7864566'],
 ['33', 'Jogging', '49112252273000', '1.8387469', '2.7649305', '-1.7570249'],
 ['33', 'Jogging', '49112362289000', '-1.2666923', '19.313654', '6.3198414'],
 ['33', 'Jogging', '49112472335000', '2.4108016', '-7.6546354', '-6.1291566'],
 ['33', 'Jogging', '49112572280000', '-0.61291564', '16.358038', '4.944186'],
 ['33', 'Jogging', '49112682296000', '0.040861044', '17.502148', '2.5333846'],
 ['33', 'Jogging', '49112792343000', '-7.6546354', '7.8180795', '4.372132'],
 ['33', 'Jogging', '49112902328000', '-1.2666923', '0.7218784', '0.8036005'],
 ['33', 'Jogging', '49113002273000', '-5.012288', '19.57244', '5.5162406'],
 ['33', 'Jogging', '49113112289000', '1.9477097', '2.7921712', '2.070293'],
 ['33', 'Jogging', '49113222305000', '-5.053149', '1.6480621', '7.6273947'],
 ['33', 'Jogging', '49113332290000', '9.384419', '13.443283', '1.0351465'],
 ['33', 'Jogging', '49113442306000', '-5.434519', '13.211738', '6.4424243'],
 ['33', 'Jogging', '49113560501000', '-0.61291564', '1.879608', '1.4165162'],
 ['33', 'Jogging', '49113842239000', '4.7126403', '-6.5513873', '-6.0201936'],
 ['33', 'Jogging', '49113952346000', '-1.7570249', '9.302697', '-6.428804'],
 ['33', 'Jogging', '49114052230000', '-0.9125633', '10.501288', '-0.27240697'],
 ['33', 'Jogging', '49114102218000', '2.6014864', '19.381754', '4.440233'],
 ['33', 'Jogging', '49114212295000', '5.7886477', '3.214402', '1.1441092'],
 ['33', 'Jogging', '49114312301000', '-1.9885708', '12.4489975', '-2.7240696'],
 ['33', 'Jogging', '49114422317000', '1.4165162', '16.780268', '8.471856'],
 ['33', 'Jogging', '49114522293000', '0.42223078', '-8.267551', '-7.3549876'],
 ['33', 'Jogging', '49114632339000', '-3.568531', '10.95076', '-0.8036005'],
 ['33', 'Jogging', '49114742355000', '-4.671779', '11.727119', '0.38136974'],
 ['33', 'Jogging', '49114852340000', '-2.1383946', '1.6889231', '3.5276701'],
 ['33', 'Jogging', '49114962295000', '-1.334794', '2.4925237', '-0.3405087'],
 ['33', 'Jogging', '49115072311000', '-2.9147544', '19.57244', '7.5865335'],
 ['33', 'Jogging', '49115172470000', '3.5276701', '-3.9499009', '-1.920469'],
 ['33', 'Jogging', '49115272262000', '-4.0588636', '10.038197', '14.2877445'],
 ['33', 'Jogging', '49115382339000', '7.5865335', '13.33432', '3.8681788'],
 ['33', 'Jogging', '49115492294000', '-5.175732', '14.1787815', '5.5162406'],
 ['33', 'Jogging', '49115602310000', '1.1849703', '2.1111538', '2.2201166'],
 ['33', 'Jogging', '49115712295000', '-3.718355', '19.463476', '-0.8036005'],
 ['33', 'Jogging', '49115812332000', '3.173541', '6.510526', '4.2086873'],
 ['33', 'Jogging', '49115912124000', '-1.7297841', '-5.6252036', '-4.3312707'],
 ['33', 'Jogging', '49115962234000', '0.84446156', '12.980191', '11.563675'],
 ['33', 'Jogging', '49116072311000', '2.7649305', '17.352324', '7.7363577'],
 ['33', 'Jogging', '49116122238000', '2.3426998', '15.894946', '3.6774938'],
 ['33', 'Jogging', '49116232315000', '4.7943625', '3.8273177', '0.9942854'],
 ['33', 'Jogging', '49116342330000', '-1.8387469', '12.830367', '-1.56634'],
 ['33', 'Jogging', '49116452316000', '5.366417', '14.410328', '6.742072'],
 ['33', 'Jogging', '49116502212000', '2.1111538', '0.27240697', '2.6423476'],
 ['33', 'Jogging', '49116642318000', '4.2086873', '11.454713', '7.6273947'],
 ['33', 'Jogging', '49116693038000', '-5.134871', '9.00305', '-3.173541'],
 ['33', 'Jogging', '49116782241000', '3.0237172', '7.164303', '0.08172209'],
 ['33', 'Jogging', '49116893203000', '2.070293', '3.486809', '1.7570249'],
 ['33', 'Jogging', '49116992202000', '-3.1054392', '4.862464', '-0.040861044'],
 ['33', 'Jogging', '49117102310000', '-4.399372', '19.531578', '5.053149'],
 ['33', 'Jogging', '49117202224000', '4.7535014', '-3.2961242', '-2.1383946'],
 ['33', 'Jogging', '49117252243000', '-0.6946377', '-7.6273947', '-7.8180795'],
 ['33', 'Jogging', '49117352279000', '-2.8330324', '6.5513873', '-7.9679036'],
 ['33', 'Jogging', '49117462722000', '-0.8036005', '10.460427', '0.23154591'],
 ['33', 'Jogging', '49117572311000', '-3.214402', '3.0645783', '3.255263'],
 ['33', 'Jogging', '49117682327000', '-2.8738933', '3.5957718', '0.10896278'],
 ['33', 'Jogging', '49117782302000', '-4.4810944', '19.504337', '5.9793324'],
 ['33', 'Jogging', '49117892318000', '2.7921712', '-1.7570249', '0.19068487'],
 ['33', 'Jogging', '49117992141000', '-4.7535014', '4.2086873', '11.141444'],
 ['33', 'Jogging', '49118252334000', '-1.56634', '3.759216', '3.255263'],
 ['33', 'Jogging', '49118362319000', '-3.214402', '2.9556155', '0.7627395'],
 ['33', 'Jogging', '49118472305000', '-2.6423476', '19.57244', '8.008764'],
 ['33', 'Jogging', '49118572219000', '0.5720546', '-1.4982382', '-0.38136974'],
 ['33', 'Jogging', '49118622512000', '-1.525479', '-7.7363577', '-8.580819'],
 ['33', 'Jogging', '49118732315000', '-4.7535014', '18.537292', '-3.1054392'],
 ['33', 'Jogging', '49118842300000', '1.7978859', '14.410328', '1.0760075'],
 ['33', 'Jogging', '49118952316000', '-0.8036005', '3.255263', '3.990762'],
 ['33', 'Jogging', '49119052291000', '-1.2258313', '3.990762', '0.8036005'],
 ['33', 'Jogging', '49119162307000', '-4.630918', '19.57244', '6.3607025'],
 ['33', 'Jogging', '49119262283000', '1.9885708', '-1.3756552', '-0.5720546'],
 ['33', 'Jogging', '49119372268000', '-4.630918', '1.920469', '8.281172'],
 ['33', 'Jogging', '49119482315000', '12.299174', '17.883516', '5.325556'],
 ['33', 'Jogging', '49119592300000', '0.9942854', '15.241169', '5.325556'],
 ['33', 'Jogging', '49119702316000', '1.0351465', '1.7570249', '1.9885708'],
 ['33', 'Jogging', '49119802322000', '-9.384419', '19.57244', '0.10896278'],
 ['33', 'Jogging', '49119912338000', '2.9556155', '5.597963', '4.630918'],
 ['33', 'Jogging', '49120012252000', '-2.3699405', '-5.366417', '-2.7513103'],
 ['33', 'Jogging', '49120122299000', '-1.879608', '10.882658', '-7.7772183'],
 ['33', 'Jogging', '49120232315000', '1.1168685', '18.496431', '3.5957718'],
 ['33', 'Jogging', '49120342361000', '5.012288', '4.372132', '1.334794'],
 ['33', 'Jogging', '49120442245000', '-3.336985', '16.589584', '-4.671779'],
 ['33', 'Jogging', '49120492233000', '-6.891896', '19.57244', '6.238119'],
 ['33', 'Jogging', '49120602310000', '3.3778462', '-0.6537767', '2.3018389'],
 ['33', 'Jogging', '49120942214000', '-2.1383946', '15.554437', '4.372132'],
 ['33', 'Jogging', '49121042221000', '5.284695', '1.6480621', '-0.29964766'],
 ['33', 'Jogging', '49121152328000', '-9.425281', '18.959524', '-4.903325'],
 ['33', 'Jogging', '49121202163000', '2.070293', '19.57244', '8.008764'],
 ['33', 'Jogging', '49121302261000', '1.6480621', '-2.6014864', '-1.4573772'],
 ['33', 'Jogging', '49121352279000', '-1.56634', '-7.7772183', '-9.112013'],
 ['33', 'Jogging', '49121462295000', '-6.932757', '13.33432', '-6.3198414'],
 ['33', 'Jogging', '49121572311000', '-4.140586', '12.871228', '-0.84446156'],
 ['33', 'Jogging', '49121682296000', '3.0237172', '2.3699405', '2.0294318'],
 ['33', 'Jogging', '49121792312000', '-1.9885708', '5.9793324', '0.040861044'],
 ['33', 'Jogging', '49121902297000', '2.9556155', '19.57244', '7.6273947'],
 ['33', 'Jogging', '49122002273000', '1.7297841', '-5.325556', '-2.7513103'],
 ['33', 'Jogging', '49122112289000', '-0.42223078', '14.1787815', '9.888372'],
 ['33', 'Jogging', '49122222305000', '3.1463003', '17.24336', '5.407278'],
 ['33', 'Jogging', '49122282272000', '-0.5720546', '18.727978', '4.671779'],
 ['33', 'Jogging', '49122392318000', '5.5162406', '3.7864566', '1.1849703'],
 ['33', 'Jogging', '49122502304000', '-4.3312707', '15.6634', '-3.445948'],
 ['33', 'Jogging', '49122612289000', '5.5571017', '14.709975', '7.43671'],
 ['33', 'Jogging', '49122722305000', '0.50395286', '-7.7772183', '-8.921328'],
 ['33', 'Jogging', '49122832290000', '-4.7126403', '6.891896', '-11.032481'],
 ['33', 'Jogging', '49122942337000', '-1.7297841', '8.962189', '-2.1111538'],
 ['33', 'Jogging', '49123043411000', '-3.214402', '3.486809', '3.6774938'],
 ['33', 'Jogging', '49123152328000', '-2.3018389', '0.84446156', '1.3075534'],
 ['33', 'Jogging', '49123212234000', '-4.7943625', '18.428331', '-4.9850473'],
 ['33', 'Jogging', '49123312240000', '4.0588636', '14.628253', '9.00305'],
 ['33', 'Jogging', '49123362289000', '1.6889231', '-0.7218784', '1.3075534'],
 ['33', 'Jogging', '49123612167000', '2.2609777', '15.213928', '7.5865335'],
 ['33', 'Jogging', '49123680191000', '2.2609777', '18.578154', '4.630918'],
 ['33', 'Jogging', '49123782333000', '5.597963', '4.630918', '-0.08172209'],
 ['33', 'Jogging', '49123832321000', '-2.070293', '1.8387469', '1.0351465'],
 ['33', 'Jogging', '49123942306000', '-5.706926', '19.57244', '6.4015636'],
 ['33', 'Jogging', '49124042282000', '1.6889231', '-1.9885708', '0.42223078'],
 ['33', 'Jogging', '49124142288000', '-3.1463003', '0.23154591', '5.597963'],
 ['33', 'Jogging', '49124252304000', '5.7477865', '15.28203', '1.0351465'],
 ['33', 'Jogging', '49124352279000', '2.4516625', '19.340895', '5.366417'],
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 ['33',
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 ['33',
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 ['33',
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 ['33', 'Walking', '49433362289000', '-3.5957718', '8.158588', '-4.099725'],
 ['33', 'Walking', '49433472305000', '0.040861044', '7.5865335', '-2.3018389'],
 ['33', 'Walking', '49433582321000', '-1.56634', '6.3198414', '-2.3699405'],
 ['33', 'Walking', '49433692306000', '0.61291564', '10.460427', '0.46309182'],
 ['33', 'Walking', '49433802292000', '0.95342433', '14.818938', '0.95342433'],
 ['33', 'Walking', '49433912307000', '-5.243834', '14.47843', '-3.1463003'],
 ['33', 'Walking', '49434012253000', '4.2495484', '6.782933', '-0.42223078'],
 ['33', 'Walking', '49434122299000', '-2.4516625', '2.1111538', '-1.4165162'],
 ['33', 'Walking', '49434222275000', '-2.070293', '18.496431', '13.633968'],
 ['33', 'Walking', '49434332290000', '-5.09401', '14.709975', '2.6832085'],
 ['33', 'Walking', '49434432235000', '-0.0', '9.384419', '0.6537767'],
 ['33', 'Walking', '49434542312000', '-2.3018389', '9.152874', '1.5390993'],
 ['33', 'Walking', '49434652298000', '2.6423476', '10.419566', '0.3405087'],
 ['33',
  'Walking',
  '49434762314000',
  '0.46309182',
  '12.9529505',
  '-0.61291564'],
 ['33', 'Walking', '49434872329000', '-6.5513873', '13.6748295', '0.8036005'],
 ['33', 'Walking', '49434982315000', '0.14982383', '2.6014864', '-1.4982382'],
 ['33', 'Walking', '49435092300000', '-4.2904096', '5.5162406', '2.5606253'],
 ['33', 'Walking', '49435202316000', '-5.47538', '10.841797', '-2.7240696'],
 ['33', 'Walking', '49435312301000', '2.4516625', '14.709975', '-0.3405087'],
 ['33', 'Walking', '49435422317000', '1.4573772', '8.471856', '-2.8330324'],
 ['33', 'Walking', '49435532303000', '0.6946377', '11.141444', '0.8036005'],
 ['33', 'Walking', '49435632248000', '2.1111538', '15.132206', '0.42223078'],
 ['33', 'Walking', '49435732315000', '-4.5219555', '13.0619135', '-3.718355'],
 ['33', 'Walking', '49435842300000', '4.0588636', '9.152874', '-0.50395286'],
 ['33', 'Walking', '49435942306000', '-2.3426998', '1.920469', '-1.7570249'],
 ['33', 'Walking', '49436052292000', '-3.718355', '14.369467', '12.367276'],
 ['33', 'Walking', '49436162307000', '-5.434519', '13.443283', '0.27240697'],
 ['33', 'Walking', '49436272293000', '-0.5720546', '10.923519', '2.2201166'],
 ['33', 'Walking', '49436382309000', '0.92618364', '10.460427', '-0.42223078'],
 ['33', 'Walking', '49436492294000', '2.4516625', '10.691973', '0.27240697'],
 ['33', 'Walking', '49436602310000', '0.95342433', '15.935807', '1.4573772'],
 ['33', 'Walking', '49436702316000', '-7.6273947', '15.4046135', '0.84446156'],
 ['33', 'Walking', '49436812301000', '2.2201166', '3.7864566', '-1.2666923'],
 ['33', 'Walking', '49436922317000', '-2.5606253', '3.6774938', '0.95342433'],
 ['33', 'Walking', '49437032303000', '-0.38136974', '7.205164', '8.117727'],
 ['33', 'Walking', '49437142318000', '0.7627395', '3.0237172', '-4.630918'],
 ['33', 'Walking', '49437252304000', '-1.7978859', '5.9793324', '-0.9942854'],
 ['33', 'Walking', '49437362289000', '-1.7978859', '8.430995', '-0.10896278'],
 ['33', 'Walking', '49437472305000', '4.6036777', '14.137921', '0.46309182'],
 ...]
columns = ['user', 'activity', 'time', 'x', 'y', 'z']
data = pd.DataFrame(data = processedList, columns = columns)
data.head()
<style scoped> .dataframe tbody tr th:only-of-type { vertical-align: middle; }
.dataframe tbody tr th {
    vertical-align: top;
}

.dataframe thead th {
    text-align: right;
}
</style>
user activity time x y z
0 33 Jogging 49105962326000 -0.6946377 12.680544 0.50395286
1 33 Jogging 49106062271000 5.012288 11.264028 0.95342433
2 33 Jogging 49106112167000 4.903325 10.882658 -0.08172209
3 33 Jogging 49106222305000 -0.61291564 18.496431 3.0237172
4 33 Jogging 49106332290000 -1.1849703 12.108489 7.205164
data.shape
(343416, 6)
data.info()
<class 'pandas.core.frame.DataFrame'>
RangeIndex: 343416 entries, 0 to 343415
Data columns (total 6 columns):
user        343416 non-null object
activity    343416 non-null object
time        343416 non-null object
x           343416 non-null object
y           343416 non-null object
z           343416 non-null object
dtypes: object(6)
memory usage: 15.7+ MB
data.isnull().sum()
user        0
activity    0
time        0
x           0
y           0
z           0
dtype: int64
data['activity'].value_counts()
Walking       137375
Jogging       129392
Upstairs       35137
Downstairs     33358
Sitting         4599
Standing        3555
Name: activity, dtype: int64

Balance this data

data['x'] = data['x'].astype('float')
data['y'] = data['y'].astype('float')
data['z'] = data['z'].astype('float')
data.info()
<class 'pandas.core.frame.DataFrame'>
RangeIndex: 343416 entries, 0 to 343415
Data columns (total 6 columns):
user        343416 non-null object
activity    343416 non-null object
time        343416 non-null object
x           343416 non-null float64
y           343416 non-null float64
z           343416 non-null float64
dtypes: float64(3), object(3)
memory usage: 15.7+ MB
Fs = 20
activities = data['activity'].value_counts().index
activities
Index(['Walking', 'Jogging', 'Upstairs', 'Downstairs', 'Sitting', 'Standing'], dtype='object')
def plot_activity(activity, data):
    fig, (ax0, ax1, ax2) = plt.subplots(nrows=3, figsize=(15, 7), sharex=True)
    plot_axis(ax0, data['time'], data['x'], 'X-Axis')
    plot_axis(ax1, data['time'], data['y'], 'Y-Axis')
    plot_axis(ax2, data['time'], data['z'], 'Z-Axis')
    plt.subplots_adjust(hspace=0.2)
    fig.suptitle(activity)
    plt.subplots_adjust(top=0.90)
    plt.show()

def plot_axis(ax, x, y, title):
    ax.plot(x, y, 'g')
    ax.set_title(title)
    ax.xaxis.set_visible(False)
    ax.set_ylim([min(y) - np.std(y), max(y) + np.std(y)])
    ax.set_xlim([min(x), max(x)])
    ax.grid(True)

for activity in activities:
    data_for_plot = data[(data['activity'] == activity)][:Fs*10]
    plot_activity(activity, data_for_plot)

png

png

png

png

png

png

df = data.drop(['user', 'time'], axis = 1).copy()
df.head()
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activity x y z
0 Jogging -0.694638 12.680544 0.503953
1 Jogging 5.012288 11.264028 0.953424
2 Jogging 4.903325 10.882658 -0.081722
3 Jogging -0.612916 18.496431 3.023717
4 Jogging -1.184970 12.108489 7.205164
df['activity'].value_counts()
Walking       137375
Jogging       129392
Upstairs       35137
Downstairs     33358
Sitting         4599
Standing        3555
Name: activity, dtype: int64
Walking = df[df['activity']=='Walking'].head(3555).copy()
Jogging = df[df['activity']=='Jogging'].head(3555).copy()
Upstairs = df[df['activity']=='Upstairs'].head(3555).copy()
Downstairs = df[df['activity']=='Downstairs'].head(3555).copy()
Sitting = df[df['activity']=='Sitting'].head(3555).copy()
Standing = df[df['activity']=='Standing'].copy()
balanced_data = pd.DataFrame()
balanced_data = balanced_data.append([Walking, Jogging, Upstairs, Downstairs, Sitting, Standing])
balanced_data.shape
(21330, 4)
balanced_data['activity'].value_counts()
Upstairs      3555
Walking       3555
Jogging       3555
Standing      3555
Sitting       3555
Downstairs    3555
Name: activity, dtype: int64
balanced_data.head()
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activity x y z
597 Walking 0.844462 8.008764 2.792171
598 Walking 1.116869 8.621680 3.786457
599 Walking -0.503953 16.657684 1.307553
600 Walking 4.794363 10.760075 -1.184970
601 Walking -0.040861 9.234595 -0.694638
from sklearn.preprocessing import LabelEncoder
label = LabelEncoder()
balanced_data['label'] = label.fit_transform(balanced_data['activity'])
balanced_data.head()
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activity x y z label
597 Walking 0.844462 8.008764 2.792171 5
598 Walking 1.116869 8.621680 3.786457 5
599 Walking -0.503953 16.657684 1.307553 5
600 Walking 4.794363 10.760075 -1.184970 5
601 Walking -0.040861 9.234595 -0.694638 5
label.classes_
array(['Downstairs', 'Jogging', 'Sitting', 'Standing', 'Upstairs',
       'Walking'], dtype=object)

Standardized data

X = balanced_data[['x', 'y', 'z']]
y = balanced_data['label']
scaler = StandardScaler()
X = scaler.fit_transform(X)

scaled_X = pd.DataFrame(data = X, columns = ['x', 'y', 'z'])
scaled_X['label'] = y.values

scaled_X
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x y z label
0 0.000503 -0.099190 0.337933 5
1 0.073590 0.020386 0.633446 5
2 -0.361275 1.588160 -0.103312 5
3 1.060258 0.437573 -0.844119 5
4 -0.237028 0.139962 -0.698386 5
5 0.442677 0.041644 -0.925081 5
6 -0.083546 0.267510 -0.856263 5
7 0.245343 0.490718 -0.686242 5
8 0.574233 0.708612 -0.880552 5
9 -0.441670 0.820217 -0.868408 5
10 -0.174904 -0.309113 -0.334055 5
11 -0.317423 -0.428689 -0.342151 5
12 -0.101818 0.073531 1.228521 5
13 -0.204139 -0.247996 1.260906 5
14 -0.430707 -0.763501 -1.277268 5
15 -0.657275 -0.189537 -0.184275 5
16 0.164948 0.049616 -0.629568 5
17 0.051664 0.296739 -0.730771 5
18 0.544998 1.274606 -0.297622 5
19 -1.285820 0.998252 -1.176065 5
20 0.946974 -0.205480 -0.524317 5
21 -0.708436 -1.377325 -0.706483 5
22 0.289195 1.941574 3.082561 5
23 -1.417375 1.752910 0.022180 5
24 0.164948 0.618266 -0.479788 5
25 0.289195 -0.136392 -1.006044 5
26 0.278232 0.169191 -0.593135 5
27 0.515764 0.969022 0.010035 5
28 -0.533028 1.550959 -1.629455 5
29 0.884851 -0.481833 -0.504076 5
... ... ... ... ...
21300 -0.617782 0.178084 0.224586 3
21301 -0.582903 0.168329 0.236730 3
21302 -0.577537 0.168329 0.236730 3
21303 -0.582903 0.178084 0.224586 3
21304 -0.582903 0.178084 0.248875 3
21305 -0.582903 0.185888 0.236730 3
21306 -0.577537 0.185888 0.269115 3
21307 -0.582903 0.185888 0.261019 3
21308 -0.577537 0.185888 0.261019 3
21309 -0.582903 0.193692 0.236730 3
21310 -0.566805 0.185888 0.236730 3
21311 -0.577537 0.185888 0.248875 3
21312 -0.582903 0.178084 0.248875 3
21313 -0.582903 0.185888 0.236730 3
21314 -0.617782 0.185888 0.236730 3
21315 -0.596318 0.197593 0.236730 3
21316 -0.582903 0.178084 0.236730 3
21317 -0.531926 0.185888 0.248875 3
21318 -0.556073 0.197593 0.236730 3
21319 -0.607050 0.168329 0.236730 3
21320 -0.566805 0.148820 0.269115 3
21321 -0.658026 0.152722 0.317693 3
21322 -0.577537 0.178084 0.350078 3
21323 -0.542658 0.185888 0.317693 3
21324 -0.470217 0.131262 0.269115 3
21325 -0.470217 0.178084 0.261019 3
21326 -0.542658 0.193692 0.248875 3
21327 -0.628514 0.197593 0.261019 3
21328 -0.781444 0.049322 0.155768 3
21329 -0.800225 0.267827 0.475569 3

21330 rows × 4 columns

Frame Preparation

import scipy.stats as stats
Fs = 20
frame_size = Fs*4 # 80
hop_size = Fs*2 # 40
def get_frames(df, frame_size, hop_size):

    N_FEATURES = 3

    frames = []
    labels = []
    for i in range(0, len(df) - frame_size, hop_size):
        x = df['x'].values[i: i + frame_size]
        y = df['y'].values[i: i + frame_size]
        z = df['z'].values[i: i + frame_size]
        
        # Retrieve the most often used label in this segment
        label = stats.mode(df['label'][i: i + frame_size])[0][0]
        frames.append([x, y, z])
        labels.append(label)

    # Bring the segments into a better shape
    frames = np.asarray(frames).reshape(-1, frame_size, N_FEATURES)
    labels = np.asarray(labels)

    return frames, labels
X, y = get_frames(scaled_X, frame_size, hop_size)
X.shape, y.shape
((532, 80, 3), (532,))
(3555*6)/40
533.25
X_train, X_test, y_train, y_test = train_test_split(X, y, test_size = 0.2, random_state = 0, stratify = y)
X_train.shape, X_test.shape
((425, 80, 3), (107, 80, 3))
X_train[0].shape, X_test[0].shape
((80, 3), (80, 3))
X_train = X_train.reshape(425, 80, 3, 1)
X_test = X_test.reshape(107, 80, 3, 1)
X_train[0].shape, X_test[0].shape
((80, 3, 1), (80, 3, 1))

2D CNN Model

model = Sequential()
model.add(Conv2D(16, (2, 2), activation = 'relu', input_shape = X_train[0].shape))
model.add(Dropout(0.1))

model.add(Conv2D(32, (2, 2), activation='relu'))
model.add(Dropout(0.2))

model.add(Flatten())

model.add(Dense(64, activation = 'relu'))
model.add(Dropout(0.5))

model.add(Dense(6, activation='softmax'))
model.compile(optimizer=Adam(learning_rate = 0.001), loss = 'sparse_categorical_crossentropy', metrics = ['accuracy'])
history = model.fit(X_train, y_train, epochs = 10, validation_data= (X_test, y_test), verbose=1)
Train on 425 samples, validate on 107 samples
Epoch 1/10
425/425 [==============================] - 1s 2ms/sample - loss: 1.6548 - accuracy: 0.2400 - val_loss: 1.3757 - val_accuracy: 0.4206
Epoch 2/10
425/425 [==============================] - 0s 292us/sample - loss: 1.3048 - accuracy: 0.4871 - val_loss: 1.0143 - val_accuracy: 0.7103
Epoch 3/10
425/425 [==============================] - 0s 294us/sample - loss: 0.9848 - accuracy: 0.6659 - val_loss: 0.7149 - val_accuracy: 0.8598
Epoch 4/10
425/425 [==============================] - 0s 273us/sample - loss: 0.7407 - accuracy: 0.7459 - val_loss: 0.4961 - val_accuracy: 0.8411
Epoch 5/10
425/425 [==============================] - 0s 299us/sample - loss: 0.5676 - accuracy: 0.8188 - val_loss: 0.3573 - val_accuracy: 0.9065
Epoch 6/10
425/425 [==============================] - 0s 296us/sample - loss: 0.4372 - accuracy: 0.8494 - val_loss: 0.2836 - val_accuracy: 0.9159
Epoch 7/10
425/425 [==============================] - 0s 301us/sample - loss: 0.3648 - accuracy: 0.8871 - val_loss: 0.2614 - val_accuracy: 0.9065
Epoch 8/10
425/425 [==============================] - 0s 315us/sample - loss: 0.3070 - accuracy: 0.9035 - val_loss: 0.3019 - val_accuracy: 0.8598
Epoch 9/10
425/425 [==============================] - 0s 287us/sample - loss: 0.3254 - accuracy: 0.8918 - val_loss: 0.2392 - val_accuracy: 0.9065
Epoch 10/10
425/425 [==============================] - 0s 303us/sample - loss: 0.2385 - accuracy: 0.9388 - val_loss: 0.2269 - val_accuracy: 0.8972
def plot_learningCurve(history, epochs):
  # Plot training & validation accuracy values
  epoch_range = range(1, epochs+1)
  plt.plot(epoch_range, history.history['accuracy'])
  plt.plot(epoch_range, history.history['val_accuracy'])
  plt.title('Model accuracy')
  plt.ylabel('Accuracy')
  plt.xlabel('Epoch')
  plt.legend(['Train', 'Val'], loc='upper left')
  plt.show()

  # Plot training & validation loss values
  plt.plot(epoch_range, history.history['loss'])
  plt.plot(epoch_range, history.history['val_loss'])
  plt.title('Model loss')
  plt.ylabel('Loss')
  plt.xlabel('Epoch')
  plt.legend(['Train', 'Val'], loc='upper left')
  plt.show()
plot_learningCurve(history, 10)

png

png

Confusion Matrix

Detailed video is available here: https://youtu.be/SToqP9V9y7Q

pip install mlxtend -> http://rasbt.github.io/mlxtend/installation/

from mlxtend.plotting import plot_confusion_matrix
from sklearn.metrics import confusion_matrix
y_pred = model.predict_classes(X_test)
mat = confusion_matrix(y_test, y_pred)
plot_confusion_matrix(conf_mat=mat, class_names=label.classes_, show_normed=True, figsize=(7,7))
(<Figure size 504x504 with 1 Axes>,
 <matplotlib.axes._subplots.AxesSubplot at 0x250748656a0>)

png

model.save_weights('model.h5')

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Human Activity Recognition Using Accelerometer Data and CNN

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