MATLAB Editor bug? "There is no anonymous function"

Hi all,

consider a simple anonymous function:

f=@(x)x.^2

In a minimal example, I made a file which contains only this line. I then click on the left of the line to add a breakpoint. MATLAB Editor offers the choice: "Set breakpoint at beginning of line" or "Set breakpoint at anonymous function" . I choose "at anonymous function" and get the following error message:

"Cannot enable breakpoint(s) because of syntax error. There is no anonymous function on line 1 of file C:\...\tmp.m"

This is consistently reproducible with R2014b and R2015a and some earlier releases.

Why does MATLAB Editor offer to set a breakpoint at the anonymous function, and then doesn't manage to do so? Is it a bug? Is there a solution?

Thanks! V.

[John D'Errico]

I had absolutely no problems here. My guess is there is something about the function you have saved, or where you saved it.

[Adam]

I get the same problem when I tried it though I never use this functionality or know what it aims to do. I just always choose the beginning of line option for my anonymous functions anyway.

[Vladimir Golkov]

So it works for John but not for Adam... Which MATLAB versions are you folks using?

[John D'Errico]

2015a here

[Stephen23]

It happens with 2012b and 2009b too. Screenshot of 2012b:

[Adam]

R2014b for me

Answer 1

[Robert Cumming]

Its because your m file is in essence a script. Try creating a larger script and but a break point in the anonymous function and you will get the same result.

Convert script to a standard function file and it will work.

So I think it is a bug it shouldn't offer the ability to put a break point in an anonymous function which is saved as part of a script.