use of built in functions; manipulating data arrays

Question

metin yilmaz 2020-11-8

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/640830-use-of-built-in-functions-manipulating-data-arrays

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.

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

Matt J 2020-11-8

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/640830-use-of-built-in-functions-manipulating-data-arrays#answer_538240

编辑：Matt J 2020-11-8

在 MATLAB Online 中打开

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

3 个评论
显示 1更早的评论隐藏 1更早的评论

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 Don't waste your time with out-of-date, half-baked, flawed books.