com.arosbio.ml.algorithms.svm.NuSVC Maven / Gradle / Ivy
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Conformal AI package, including all data IO, transformations, machine learning models and predictor classes. Without inclusion of chemistry-dependent code.
/*
* Copyright (C) Aros Bio AB.
*
* CPSign is an Open Source Software that is dual licensed to allow you to choose a license that best suits your requirements:
*
* 1) GPLv3 (GNU General Public License Version 3) with Additional Terms, including an attribution clause as well as a limitation to use the software for commercial purposes.
*
* 2) CPSign Proprietary License that allows you to use CPSign for commercial activities, such as in a revenue-generating operation or environment, or integrate CPSign in your proprietary software without worrying about disclosing the source code of your proprietary software, which is required if you choose to use the software under GPLv3 license. See arosbio.com/cpsign/commercial-license for details.
*/
package com.arosbio.ml.algorithms.svm;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import com.arosbio.commons.GlobalConfig;
import com.arosbio.data.DataRecord;
import com.arosbio.data.FeatureVector;
import com.arosbio.ml.algorithms.MultiLabelClassifier;
import com.arosbio.ml.algorithms.impl.LibSvm;
import com.arosbio.ml.algorithms.impl.LibSvm.KernelType;
import com.arosbio.ml.algorithms.impl.LibSvm.SvmType;
import libsvm.svm_model;
import libsvm.svm_parameter;
public class NuSVC implements SVC, MultiLabelClassifier {
public static final String ALG_NAME = "NuSVC";
public static final int ALG_ID = 13;
/**
* Parameters that holds all info
*/
private svm_parameter parameters = LibSvm.getDefaultParams(SvmType.NU_SVC);
private svm_model svm;
private long seed = GlobalConfig.getInstance().getRNGSeed();
// Nu
public double getNu() {
return parameters.nu;
}
public void setNu(double nu) {
parameters.nu = nu;
}
public NuSVC withNu(double nu){
parameters.nu = nu;
return this;
}
// Epsilon
public double getEpsilon() {
return parameters.eps;
}
public void setEpsilon(double eps) {
parameters.eps = eps;
}
public NuSVC withEpsilon(double eps) {
parameters.eps = eps;
return this;
}
// Kernel type
public KernelType getKernel() {
return KernelType.forID(parameters.kernel_type);
}
public void setKernel(KernelType kernel) {
parameters.kernel_type = kernel.id;
}
public NuSVC withKernel(KernelType kernel) {
parameters.kernel_type = kernel.id;
return this;
}
/// Gamma
public double getGamma() {
return parameters.gamma;
}
public void setGamma(double gamma){
if (gamma < 0)
throw new IllegalArgumentException("Parameter 'gamma' must be >=0");
parameters.gamma = gamma;
}
public NuSVC withGamma(double gamma){
setGamma(gamma);
return this;
}
// KERNEL DEGREE
public int getDegree() {
return parameters.degree;
}
public void setDegree(int degree) {
parameters.degree = degree;
}
public NuSVC withDegree(int degree) {
parameters.degree = degree;
return this;
}
// KERNEL COEF0
public double getCoef0() {
return parameters.coef0;
}
public void setCoef0(double coef0) {
parameters.coef0=coef0;
}
public NuSVC withCoef0(double coef0) {
parameters.coef0=coef0;
return this;
}
// CACHE SIZE
public double getCacheSize() {
return parameters.cache_size;
}
public void setCacheSize(double cacheMB) {
if (cacheMB < 100)
throw new IllegalArgumentException("Parameter 'cache-size' must be >=100");
parameters.cache_size = cacheMB;
}
public NuSVC withCacheSize(double cacheMB) {
setCacheSize(cacheMB);
return this;
}
// SHRINKING
public boolean getShrinking() {
return parameters.shrinking == 0 ? false : true;
}
public void setShrinking(boolean doShrinking) {
parameters.shrinking = (doShrinking? 1 : 0);
}
public NuSVC withShrinking(boolean doShrinking) {
setShrinking(doShrinking);
return this;
}
// Seed
@Override
public Long getSeed() {
return seed;
}
@Override
public void setSeed(long seed) {
this.seed = seed;
}
public NuSVC withSeed(long seed){
this.seed = seed;
return this;
}
@Override
public List getConfigParameters(){
List params = new ArrayList<>();
params.add(LibSvm.NU_CONFIG);
params.addAll(LibSvm.GENERAL_CONFIG_PARAMS);
return params;
}
@Override
public void setConfigParameters(Map params) throws IllegalStateException, IllegalArgumentException {
svm_parameter clone = (svm_parameter) parameters.clone();
LibSvm.setConfigParameters(clone, params);
parameters = clone; // trick to not update unless everything passes
}
@Override
public Map getProperties() {
Map prop = LibSvm.toProperties(parameters);
prop.put(ML_NAME_PARAM_KEY, ALG_NAME);
prop.put(ML_ID_PARAM_KEY, ALG_ID);
return prop;
}
@Override
public boolean isFitted() {
return svm != null;
}
@Override
public List getLabels() {
return LibSvm.getLabels(svm);
}
@Override
public NuSVC clone() {
NuSVC clone = new NuSVC();
// Only copy the actual parameters
clone.parameters = (svm_parameter) parameters.clone();
clone.seed = seed;
return clone;
}
@Override
public String getName() {
return ALG_NAME;
}
@Override
public int getID() {
return ALG_ID;
}
@Override
public String toString() {
return ALG_NAME;
}
@Override
public String getDescription() {
return "Support Vector Classification (SVC) implemented in LIBSVM. Uses 'nu' parameter instead of standard 'C' used in "+ C_SVC.ALG_NAME + ", the results should however be identical, apart from the re-parametrization of cost into nu.";
}
/*
* =================================================
* TRAIN
* =================================================
*/
@Override
public void train(List trainingSet) throws IllegalArgumentException {
svm = LibSvm.train(parameters, trainingSet, seed);
}
@Override
public void fit(List trainingSet) throws IllegalArgumentException {
svm = LibSvm.train(parameters, trainingSet, seed);
}
/*
* =================================================
* PREDICTIONS
* =================================================
*/
@Override
public int predictClass(FeatureVector feature) throws IllegalStateException {
return LibSvm.predictClass(svm, feature);
}
@Override
public Map predictScores(FeatureVector example) throws IllegalStateException {
return LibSvm.predictDistanceToHyperplane(svm, example);
}
@Override
public Map predictDistanceToHyperplane(FeatureVector example) throws IllegalStateException {
return LibSvm.predictDistanceToHyperplane(svm, example);
}
/*
* =================================================
* I/O
* =================================================
*/
@Override
public void saveToStream(OutputStream ostream) throws IOException, IllegalStateException {
LibSvm.saveToStream(svm, ostream);
}
@Override
public void loadFromStream(InputStream istream) throws IOException {
svm = LibSvm.loadFromStream(istream);
parameters = svm.param;
}
}