How can I check whether the strictly positive elements of each row of a matrix are equal?

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MRC
MRC 2014-4-29
评论： dpb 2014-4-29
How can I check whether the strictly positive elements of each row of a matrix are equal? E.g. if
A=[0 1 1 2; 0 1 0 1; 3 0 3 0]
I want
B=[0;1;1]
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采纳的回答

per isakson
per isakson 2014-4-29
编辑：per isakson 2014-4-29
arrayfun( @(jj) (length(unique(A(jj,(A(jj,:)>0)))) == 1),(1:size(A,1)) )
returns
ans =
0 1 1

更多回答（2 个）

Sara
Sara 2014-4-29
B = zeros(size(A,1),1);
for i = 1:size(A,1)
temp = A(i,:);
temp = temp(temp>0);
temp = unique(temp);
if(length(temp) == 1)
B(i) = 1;
end
end
dpb
dpb 2014-4-29
The "deadahead" solution...
isPos=false(size(A,1),1);
for i=1:size(A,1)
isPos(i)=all(diff(A(i,A(i,:)>0))==0);
end
Vectorize at your leisure... :)
  2 个评论
dpb
dpb 2014-4-29
Yes, w/ arrayfun. That was left as "exercise for the student" :)
As illustrated by Per; same idea with anonymous function. As also showed, any of a number of ways to check on the consistency of the values in a row is doable.

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