MATLAB: Undefined operator ‘:’ for input arguments of type ‘function_handle’

Question

Hey,

I keep getting this message and have no idea whats wrong. It has something to do with the ymax function, this I know.

Undefined operator ':' for input arguments of type 'function_handle'

code

h=1;

x=[0:h:10];

ymax= @ (xx)5.*sin(pi.*xx./10);

y=[0:h:ymax] ;

[xx,yy]=ndgrid(x,y);

mat = exp(-0.25.*((xx-8).^2 + (yy-0).^2)) .*cos((xx-8-yy)/6);

b{1}=x; b{2}=y;

T=Trapets(b,mat,2);

Grateful for all help recieved.

Answer 1

You need to give ‘ymax’ an argument, so it returns a value.

This works:

ymax= @(xx) 5.*sin(pi.*xx./10);
h = 1;
y=[0:h:ymax(2)];