use of built in functions; manipulating data arrays

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metin yilmaz
metin yilmaz 2020-11-8
评论： Matt J 2020-11-9
Would you please explain when this works
>> d = [1, 2, 3; 4, 5, 6];
f = size(d)
f =
2 3
>> [rows,cols] = size(d)
Why is it that this does not work?
>> [rows, cols]=[2 3]
Too many output arguments
Thank you.

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Matt J
Matt J 2020-11-8
编辑：Matt J 2020-11-8
Ran in:
The operation [2,3] is a matrix concatenation, which has only 1 output (the concatenated matrix). It is equivalent to making the following function call,
horzcat(2,3)
ans = 1×2
2 3
●
This is what you want to do instead,
[row,col]=deal(2,3)
row = 2
col = 3
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Stephen23
Stephen23 2020-11-9
"I have three different basic matlab books with the pages about 300,400, and 700 respectively but unfortunately they don't cover functions I encounter in matlab forums. They don't also cover horzcat and dial. "
This is the best place to learn MATLAB:
https://www.mathworks.com/help/matlab/getting-started-with-matlab.html
That page links to tutorials you can work through yourself, and the MATLAB Onramp is a series of videos that teaches basic concepts that you will need to know. Don't waste your time with out-of-date, half-baked, flawed books.
Matt J
Matt J 2020-11-9
Thank you for your all introducing functions horzcat and the concept matrix concatenation.
You're welcome. If this resolves your question, though, please Accept-click the answer.

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