Weka function to retrieve the linear regression weights:
import java.util.List;
import weka.classifiers.Evaluation;
import weka.classifiers.functions.SMOreg;
import weka.classifiers.functions.supportVector.Kernel
.....
public double[] getCoefficients(){
String svmClassifier = svm.toString();
List<Double> coefficents = new ArrayList<Double>();
double[] coeficcientsArray = null;
if(svmClassifier.contains("weights (not support vectors):")){
String[] svmClassStrings = svmClassifier.split(System.lineSeparator());
int i = 0;
boolean lastFound = false;
while( i < svmClassStrings.length && !lastFound){
String currentString = svmClassStrings[i];
if(currentString.contains("weights (not support vectors):")){
i++;
while(i < svmClassStrings.length && !lastFound){
currentString = svmClassStrings[i];
String[] parts = currentString.split("\\s+");
if(parts.length < 5){
lastFound = true;
}else{
String number = parts[1] + parts[2];
coefficents.add(Double.parseDouble(number));
}
i++;
}
}
i++;
}
}