如何绘制自定义函数的轮廓图?

myFunction ARRAYFUN x y

[x,y] = meshgrid(0:0.5:3);      %# Create a mesh of x and y points
z = arrayfun(@myFunction,x,y);  %# Compute z (same size as x and y)

CONTOUR z CONTOURF

contourf(x,y,z,1);  %# Plots 1 contour level, filling the area on either
                    %#   side with different color

IMAGESC

imagesc(x(1,:),y(:,1),z);

function bincontour
    clear; clc;

    xrange = 0:.5:3;
    yrange = 1:.5:5;
    [xmesh, ymesh] = meshgrid(xrange, yrange);
    z = arrayfun(@myFunction, xmesh, ymesh);

    contourf(xrange, yrange, z, 5)
end

function val = myFunction(val1, val2)
    val = rand() > 0.5;
end