Undefined function or Variable error

Hi,

I create a function to use the Mid-point formula to calculate the integral value, but it keeps showing undefined error. I wonder where is the problem, and how I can fix it? Thanks!

Answer 1

[Walter Roberson]

x = a:h:b;

However, any current version of MATLAB may have problems with you replacing the function handle f with the result of invoking the function handle. Use different variable names for the function handle and the result of evaluation.

[Dan]

I got it! Thank you so much!