if i have some matrix how can i do this operation on it ?

Question

Firas Al-Kharabsheh 2016-4-29

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/281757-if-i-have-some-matrix-how-can-i-do-this-operation-on-it

评论： Walter Roberson 2016-4-29

if i have matrix where the size of it is (2,5) and i have a matrix

 a = [ 1 3
       3 1 ]
 * where a matrix show how many of ones will be in the f matrix and between these group of ones just one zero

how to generate matrix like this

 f = [ 1 0 1 1 1
       1 1 1 0 1 ]

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Answer 1

Azzi Abdelmalek 2016-4-29

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/281757-if-i-have-some-matrix-how-can-i-do-this-operation-on-it#answer_220097

在 MATLAB Online 中打开

This is not the best way, but it works

a = [ 1 3
     3 1 ]
b=arrayfun(@(x) [0 ones(1,x)],a,'un',0)
c=arrayfun(@(x) cell2mat(b(x,:)),(1:size(a,1))','un',0)
d=cell2mat(c);
out=d(:,2:end)

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Firas Al-Kharabsheh 2016-4-29

在 MATLAB Online 中打开

if i have this code to search about the row which make the if statement is true and put it in F matrix

 a = [3 2 0 
      2 1 1 
      2 1 1
      2 1 0
      3 2 0
      4 3 0
      5 4 0
      4 3 0
      4 3 0
      10 0 0 ]
 a1=sum(a,2)
 b1=sum(a~=0,2)
 n1 = 10 
 m1 = 10
[n,m]=size(a)
F = zeros(n1,m1)
for k=1:n
 if 10 == (a1(k) + (b1(k) -1 ))
 b=arrayfun(@(x) [0 ones(1,x)],a,'un',0)
 c=arrayfun(@(x) cell2mat(b(x,:)),(1:size(a,1))','un',0)
 d=cell2mat(c);
 out=d(:,2:end)
 end
end
 the final answer will be 
 F = [ 0 0 0 0 0 0 0 0 0 0
       0 0 0 0 0 0 0 0 0 0
       0 0 0 0 0 0 0 0 0 0
       0 0 0 0 0 0 0 0 0 0
       0 0 0 0 0 0 0 0 0 0
       0 0 0 0 0 0 0 0 0 0
       1 1 1 1 1 0 1 1 1 1 
       0 0 0 0 0 0 0 0 0 0
       0 0 0 0 0 0 0 0 0 0
       1 1 1 1 1 1 1 1 1 1 ]

Walter Roberson 2016-4-29

You asked that question already, in http://www.mathworks.com/matlabcentral/answers/281767-how-to-fix-this-code-and-give-the-right-answer .

You duplicate your questions too much, which is a pain to clean up after. The volunteers can either spend time answering code or they can spend time cleaning up questions, but they don't have time to do both.

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