Matlab editor issue, a bug?

Question

I am having this problem that when I run the below written code in the main screen matlab does'nt give me a problem.

However if i write it in the editor then it complains that it is invalid syntax. Can you tell me what am i doing wrong or is it a bug?

Ques1 = { @(data) mean(data)  @(data) std(data) };
mean = Ques1 {1} (data(:,1)) # runs perfectly on the main compiler screen

On my editor page the compilers complains on the = sign that a possible bracket is missing. However I do not understand why it works on the matlab line by line compiler !!

Does the editor give you a yellow or red alert on the line mean = Ques1 {1} (data(:,1))? — macduff
– macduff, Commented Feb 25, 2012 at 23:43

user677656 · Accepted Answer · 2012-02-25 23:34:38Z

3

Those two lines of code are absolutely correct. Somewhere in you code you have forgotten an open left bracket e.g. [ , { , (

answered Feb 25, 2012 at 23:34

user677656

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Andrew Janke Over a year ago

+1 Try hitting Ctrl-A Ctrl-I in the editor to have it reindent based on syntax; this can help you spot mismatched brackets.

macduff · Accepted Answer · 2012-02-27 16:12:22Z

EDIT Now I understand what g24l was saying! Yes, that is likely the culprit of your problem.

Not sure what version of matlab you're using but when I run a very simple script:

data = kron(1:25,transpose(1:25)); % very simple 2D matrix of data;

Ques1 = { @(data) mean(data)  @(data) std(data) };
mean1 = Ques1 {1} (data(:,1)) % runs perfectly on the main compiler screen

It works perfectly on R2007B and R2009B, are you using an older or newer version? I suspect there is some other issue creeping up in your script. Also, as a matter of following Mathworks recommended programming procedures, I would encourage you not to name a variable or function the same name as another variable or function. In this instance I'm referring to mean = .... It's easy to get this stuff mixed up and then have nasty problems. If you need more help, please feel free to post more of your script. Hope this helps!

tmpearce · Accepted Answer · 2012-02-25 23:34:30Z

0

I don't have access to Matlab at the moment so I can't test this out, but your syntax doesn't look right to me. Try this:

Ques1 = {@(data)mean, @(data)std};
mean = Ques1{1}(data(:,1))

If you run it your way in your debugger, how many elements does it say are in your cell array?

answered Feb 25, 2012 at 23:34

tmpearce

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