You can pass Java® variables to MATLAB® using these methods:
Pass the variables as function arguments in calls
to the MatlabEngine feval and fevalAsync methods.
Variables passed as arguments to function calls are not stored in
the MATLAB base workspace.
Put the variables in the MATLAB base workspace
using the MatlabEngine putVairable and putVariableAsync methods.
For information on type conversions, see Java Data Type Conversions.
This example code passes the coefficients of a polynomial, ,
to the MATLAB roots function.
Define a double array p to pass
as an argument for the MATLAB roots function.
Define a double array r to accept
the returned values.
import com.mathworks.engine.*;
public class javaPassArg{
public static void main(String[] args) throws Exception{
MatlabEngine eng = MatlabEngine.startMatlab();
double[] p = {1.0, -1.0, -6.0};
double[] r = eng.feval("roots", p);
for (double e: r) {
System.out.println(e);
}
eng.close();
}
}This example code puts variables in the MATLAB workspace
and uses those variables as arguments in a MATLAB call to the MATLAB complex function. The MATLAB who command lists the workspace variables.
import com.mathworks.engine.*;
import java.util.Arrays;
public class javaPutVar {
public static void main(String[] args) throws Exception {
MatlabEngine eng = MatlabEngine.startMatlab();
eng.putVariable("x", 7.0);
eng.putVariable("y", 3.0);
eng.eval("z = complex(x, y);");
String[] w = eng.feval("who");
System.out.println("MATLAB workspace variables " + Arrays.toString(w));
eng.close();
}
}