README.md

android-matrix-algorithms

Java library to be used on Android, simply applies precomputed matrices etc. as generated by py-matrix-algorithms.

Algorithms

• Simple PLS (SIMPLS)
• Savitzky-Golay
• Standardize
• Log

Usage

Use the following code to load the preprocessing map from the serialized file map.bin (with one and two named pipelines) and apply it to data (processing the same data with both pre-processing pipelines):

import com.github.waikatodatamining.androidmatrix.PreprocessingMap;
import java.io.FileInputStream;
import java.utils.Map;
import java.utils.HashMap;
 
PreprocessingMap preprocessingMap;
preprocessingMap = new PreprocessingMap(new FileInputStream("map.bin"));

double[] data = ...;
Map<String, double[]> map = new HashMap<>();
map.put("one", data);
map.put("two", data);

// for ordered application
double[][] processedOrdered = preprocessingMap.applyOrdered(data);
 
// for mapped application
Map<String, double[]> processedMapped = preprocessingMap.apply(data);

Android

See the following StackOverflow post for how to wrap a java.nio.ByteBuffer in a java.io.InputStream:

https://stackoverflow.com/a/6603018/4698227