Cycle For how can i??

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Jah-lahfui 2015-1-15

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评论： Jah-lahfui 2015-1-16

Hello guys i have a matrix W(418*413) i need to do a "for cycle" that goes from 2:417 and that goes from 2:412 but instead of writing down the final number i want write "end-1" but when i write end it assumes that im ending the cycle of course, how can i write the right way so it can identify that it goes from 2 line till end-1.

P.e. for nx=2:412 but instead of writing 412 i want it "end-1"

for ny=2:417 the same here.

end end

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Answer 1

Ilham Hardy 2015-1-15

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编辑：Ilham Hardy 2015-1-16

在 MATLAB Online 中打开

If i fully understand the question, below is the "cycle for loop" that you want,

 for idrow = 2:size(W,1)-1
    for idcol = 2:size(W,2)-1
       do stuff
    end
 end

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Jah-lahfui 2015-1-16

Thanks a lot!

Jah-lahfui 2015-1-16

Just could you tell me whats the point of making size(W,1) and size(W,2). The function size(W,dim) what means dim?

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Answer 2

Iain 2015-1-15

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https://ww2.mathworks.cn/matlabcentral/answers/170037-cycle-for-how-can-i#answer_164952

在 MATLAB Online 中打开

 for i = 2:numel(x)
  do stuff
 end

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Jah-lahfui 2015-1-15

monospaced u sure man? numel counts the number of numbers in the matrix right, but isn't there other way where i can define that i want from 1:end-1 and mathlab knows that i mean the end of W matrix?