Why do I get this error in the code?

So I put this code in from an example, http://au.mathworks.com/help/matlab/ref/colormap.html, and changed the surf to mesh. I get this error: Subscript indices must either be real positive integers or logicals.

    figure
    ax1 = subplot(2,1,1);
    mesh(peaks)
    colormap(ax1,spring)

    ax2 = subplot(2,1,2);
    mesh(peaks)
    colormap(ax2,winter)

This is the error message

    Error in surf (line 4)
    colormap(ax1,spring)

I don't know what is wrong. Thanks.

[Walter Roberson]

You should not name your file surf.m as that is going to conflict with the MATLAB surf() command.

Answer 1

[Walter Roberson]

In the code or script not shown, you possibly have created a variable named "colormap".