error using trapz

I am using the "trapz" function and keep getting the error:

Error using trapz (line 66)

Point spacing must be a scalar specifying uniform spacing or a vector of x-coordinates for each data point.

Answer 1

[MathWorks Support Team]

This error is indicating that the first input, X, into "trapz" is not the proper size.

The X input must be a uniform scalar spacing, or a vector of coordinates.

- If X is a scalar, then it specifies a uniform spacing between the data points and trapz(X,Y) is equivalent to X*trapz(Y).

- If X is a vector, then it specifies x-coordinates for the data points and length(X) must be the same as the size of the integration dimension in Y.

For more information on these inputs, see the following documentation page:

https://www.mathworks.com/help/matlab/ref/trapz.html

You can check your variables to ensure they are as expected by using the debugger. The following link explains how you can use the debugger to find the issue:

https://www.mathworks.com/help/matlab/matlab_prog/debugging-process-and-features.html