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how can I create a name like myfunc500?!

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mim
mim on 17 Sep 2013
Closed: MATLAB Answer Bot on 20 Aug 2021
I have a lot of matrices with these names:
A200
A300
A400
...
and I want to do some algebra on each of them. I am looking for writing a loop to do all of them together, but how can I do it? I need to write a loop like:
for i =200:100:500
Ai(50,50) = mean (:,50)
end
but it is not possible in this way. Does anyone has a suggestion?
thanks
  1 Comment
Jan
Jan on 17 Sep 2013
A very very frequently asked question. And the solution is always the same: Do not hide indices in the names of variables. Use indices as indices instead. See Walter's answer.

Answers (2)

Walter Roberson
Walter Roberson on 17 Sep 2013

Image Analyst
Image Analyst on 18 Sep 2013
If you have just a handful of them (say, less than 7 or 8) then just deal with them one at a time or pass them into a function if you want to do the same things on all of them.
ProcessData(A100);
ProcessData(A200);
....
ProcessData(A800);
If you have more than that, I'd try to change the m-file that created them so it doesn't create them but creates regular indexed arrays, like a 3D array if you have 300 2D arrays to deal with,
for plane = 1 : 800
ProcessData(A(:,:,plane));
end
or (last resort) use a cell array.
for theCellIndex = 1 : 800 % Process 800 arrays inside cells.
ProcessData(A{theCellIndex});
end
See the FAQ for a discussion of cells.

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