Populating 2D meshgrid of a function of four variables

I have a function:

function [y, Grad, Hess] = Target(x)

...

end;

where x's size is 4 (a vector of 4 variables).

How to plot a contour of Target() using a meshgrid of two variables? Something like this code:

xC1 = linspace(0.1, 1.9);

yR1 = linspace(0.1, 1.9);

[XC1, YR1] = meshgrid(xC1, yR1);

% this is wrong: [Z, ~, ~] = Target([XC1, 1, YR1, 1]); how to do it right?

contour(XC1, YR1, Z)

Answer 1

[Matt J]

As long as you don't care about efficiency,

fun=@(x,y) Target([x,1,y,1]);

Z=arrayfun(fun, XC1,YR1);

[Valeri Aronov]

Thanks, Matt, appreciated.