Smooth function not working

The smooth function has stopped working for me.

Example input: test = smooth(data,10);

Error message: Error using smooth (line 36)

Input matrices must be the same length.

I am working with 2018a and I have verified that I still have the Curve Fitting Toolbox.

Answer 1

[Walter Roberson]

which smooth

You will find that you are using some other smooth function, not toolbox/curvefit/curvefit/smooth.m . In the official smooth function, line 36 is a comment.