What is the definition and operation of [row,col]

Question

juan sanchez 2018-7-8

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/409306-what-is-the-definition-and-operation-of-row-col

编辑： Jan 2018-7-8

Does this mean all rows and all columns selected and read off a data file?>

1 个评论
显示 -1更早的评论隐藏 -1更早的评论

dpb 2018-7-8

编辑：dpb 2018-7-8

Alone, just creates a new array of unknown dimensions...it's indeterminate as to whether row, col are even variables (probably) or functions in isolation, however.

Must have context to know anything more...

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

Jan 2018-7-8

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/409306-what-is-the-definition-and-operation-of-row-col#answer_327968

编辑：Jan 2018-7-8

在 MATLAB Online 中打开

It depends on what "row" and "col" are and on the context:

row = 2;
col = 3;
x   = [row, col]    % a [1 x 2] vector with the contents: [2,3]
% or:
y = rand(3,4)
[row, col] = size(y)   % Now row is 3 and col is 4

Maybe:

row = 4;
col = 5;
x   = rand(1, 20);
y   = reshape(x, [row, col])
% Now y is a [4 x 5] matrix containing the elements of x

There are many further possible meanings, so please post the context. Maybe it helps, if you simply try it and run the code in the command window. Experiments can reveal the meaning very easily.