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Check and replace elements in a matrix

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Konstantinos
Konstantinos 2015-1-9
评论： Konstantinos 2015-1-9
I have a random generated matrix (2x8) which consist of zeros and ones. How can I check, in each row, if there are 2 ones in the first 4 elements and 1 one in the last 4 elements ? Moreover, If there are more ones than the prescribed, I would like to exchange the redundants ones with zeros.
i.e rand = ( 1 1 1 0 0 1 1 0; 0 1 1 1 0 1 0 0 )
modified_rand = ( 1 1 0 0 0 1 0 0; 0 1 1 0 0 1 0 0 )
Any help could be useful. Thanks in advance !

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Azzi Abdelmalek
Azzi Abdelmalek 2015-1-9
a=[ 1 1 1 0 0 1 1 0; 0 1 1 1 0 1 0 0 ]
a1=a(:,1:4);
a2=a(:,5:end)
a1(cumsum(a1,2)>2)=0
a2(cumsum(a2,2)>1)=0
b=[a1 a2]
  2 个评论
Konstantinos
Konstantinos 2015-1-9
If there are more ones than the prescribed number, is it possible to find random which ones to keep and which ones to replace with zeros ?

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