function error (GUIDE)

Hello, I'm getting error messagges at the end of my GUIDE script and i don't know what i should do.

I didn't change anything, that's just what the program did.

Can someone help me?

Thank you!

[Walter Roberson]

There is a red mark near the top. You need to look at that error: it is probably causing the other errors.

I suspect that there is an if without end or [ without ] or something like that.

Answer 1

[Nikhil Sapre]

Hi Kristin,

Based on the snippet of code you posted, I see that the function blocks don't have an end. Hence the errors.

Here's an example of how a fucntion declaration should look like

function ave = average(x)
    ave = sum(x(:))/numel(x); 
end

Please refer to the the documentation on how to declare function in MATLAB for more details

Thanks,

Nikhil

[Walter Roberson]

GUIDE has gone through several generations. In most of the generations, it uses functions that do not end with end . That is perfectly acceptable. As the link you posted indicates,

The end keyword is required when:

• Any function in the file contains a nested function.
• The function is a local function within a function file, and any local function in the file uses the end keyword.
• The function is a local function within a script file.

and GUIDE never uses nested functions and does not generate a script, so end would only be needed if some local function used end .

Does GUIDE generate local functions with end ? Traditionally it did not. I have seen some hints that it might have done so in the very last couple of releases before it was retired... but it is also possible that people had hand-editted the code I was looking at.

Does the user have the situation where an end was used for a local function at some point? I cannot rule that out. However, when that happens, there is a specific error generated about how at least one local function had an end but other ones did not.

Unfortunately my system is quite busy at the moment so I cannot test to be sure exactly what is going on.