Fixed the data location and made hist -d gracefully quit if not demo …

…file exists

bashplotlib/histogram.py

@@ -2,6 +2,8 @@
 
 import math
 import optparse
+import os
+from os.path import dirname
 import sys
 from utils.helpers import *
 from utils.commandhelp import hist
@@ -30,32 +32,47 @@ def read_numbers(numbers):
         for n in open(numbers):
             yield float(n.strip())
 
+
 def run_demo():
-    "demo the product"
+    """
+    Run a demonstration
+    """
+    module_dir = dirname(dirname(os.path.realpath(__file__)))
+    demo_file = os.path.join(module_dir, 'examples/data/exp.txt')
+
+    if not os.path.isfile(demo_file):
+        sys.stderr.write("demo input file not found!\n")
+        sys.stderr.write("run the downloaddata.sh script in the example first\n")
+        sys.exit(1)
+
     #plotting a histogram
     print "plotting a basic histogram"
-    print "plot_hist('./data/exp.txt')"
-    print "hist -f ./data/exp.txt"
-    print "cat ./data/exp.txt | hist"
-    plot_hist('./data/exp.txt')
-    print "*"*80
+    print "plot_hist('%s')" % demo_file
+    print "hist -f %s" % demo_file
+    print "cat %s | hist" % demo_file
+    plot_hist(demo_file)
+    print "*" * 80
+
     #with colors
     print "histogram with colors"
-    print "plot_hist('./data/exp.txt', colour='blue')"
-    print "hist -f ./data/exp.txt -c blue"
-    plot_hist('./data/exp.txt', colour='blue')
-    print "*"*80
+    print "plot_hist('%s', colour='blue')" % demo_file
+    print "hist -f %s -c blue" % demo_file
+    plot_hist(demo_file, colour='blue')
+    print "*" * 80
+
     #changing the shape of the point
     print "changing the shape of the bars"
-    print "plot_hist('./data/exp.txt', pch='.')"
-    print "hist -f ./data/exp.txt -p ."
-    plot_hist('./data/exp.txt', pch='.')
-    print "*"*80
+    print "plot_hist('%s', pch='.')" % demo_file
+    print "hist -f %s -p ." % demo_file
+    plot_hist(demo_file, pch='.')
+    print "*" * 80
+
     #changing the size of the plot
     print "changing the size of the plot"
-    print "plot_hist('./data/exp.txt', height=35.0, bincount=40)"
-    print "hist -f ./data/exp.txt -s 35.0 -b 40"
-    plot_hist('./data/exp.txt', height=35.0, bincount=40)
+    print "plot_hist('%s', height=35.0, bincount=40)" % demo_file
+    print "hist -f %s -s 35.0 -b 40" % demo_file
+    plot_hist(demo_file, height=35.0, bincount=40)
+
 
 def plot_hist(f, height=20.0, bincount=None, binwidth=None, pch="o", colour="white", title="", xlab=None, showSummary=False, regular=False):
     """make a histogram

examples/downloaddata.sh

@@ -1,13 +1,14 @@
 #!/usr/bin/env bash
 
-if [ ! -d data ]; then
-    mkdir data
+dir=$(dirname "$0")
+
+if [ ! -d "${dir}data" ]; then
+    mkdir "${dir}/data"
 fi
-cd data
 
-curl -L 'https://dl.dropbox.com/sh/jjeubxlxuqkzkeq/5W6zkUZXww/million.txt?dl=1' > million.txt
-curl -L 'https://dl.dropbox.com/s/yuxlaj8okcjta9t/exp.txt?dl=1' > exp.txt
-curl -L 'https://dl.dropbox.com/s/cbf5skx34grlwy6/lower48.txt?dl=1' > lower48.txt
-curl -L 'https://dl.dropbox.com/s/gsu2y9vqnx5ps5i/texas.txt?dl=1' > texas.txt
-curl -L 'https://dl.dropbox.com/s/4zws1nbamorcy9z/x_test.txt?dl=1' > x_test.txt
-curl -L 'https://dl.dropbox.com/s/mlt4gfqr6n24kxj/y_test.txt?dl=1' > y_test.txt
+curl -L 'https://dl.dropbox.com/sh/jjeubxlxuqkzkeq/5W6zkUZXww/million.txt?dl=1' > "${dir}/data/million.txt"
+curl -L 'https://dl.dropbox.com/s/yuxlaj8okcjta9t/exp.txt?dl=1' > "${dir}/data/exp.txt"
+curl -L 'https://dl.dropbox.com/s/cbf5skx34grlwy6/lower48.txt?dl=1' > "${dir}/data/lower48.txt"
+curl -L 'https://dl.dropbox.com/s/gsu2y9vqnx5ps5i/texas.txt?dl=1' > "${dir}/data/texas.txt"
+curl -L 'https://dl.dropbox.com/s/4zws1nbamorcy9z/x_test.txt?dl=1' > "${dir}/data/x_test.txt"
+curl -L 'https://dl.dropbox.com/s/mlt4gfqr6n24kxj/y_test.txt?dl=1' > "${dir}/data/y_test.txt"

examples/sample.sh

@@ -1,24 +1,26 @@
 #!/usr/bin/env bash
 
-if [ ! -d data ]; then 
+dir=$(dirname "$0")
+
+if [ ! -d "${dir}/data" ]; then 
     echo 'downloading data'
-    ./downloaddata.sh
+    "${dir}/downloaddata.sh"
 fi
 
 echo 'plotting coordinates'
-scatter --file ./data/texas.txt
+scatter --file "${dir}/data/texas.txt"
 
 echo 'with x and y coords'
-scatter -x ./data/x_test.txt -y ./data/y_test.txt
+scatter -x "${dir}/data/x_test.txt" -y "${dir}/data/y_test.txt"
 
 echo 'plotting a histogram'
-hist --file ./data/exp.txt
+hist --file "${dir}/data/exp.txt"
 
 echo 'with colors'
-hist --file ./data/exp.txt --colour blue
+hist --file "${dir}/data/exp.txt" --colour blue
 
 echo 'changing the shape of the point'
-hist --file ./data/exp.txt --pch .
+hist --file "${dir}/data/exp.txt" --pch .
 
 #echo 'using stdin'
 #curl -sL https://dl.dropbox.com/u/49171662/example.txt | hist