How to use the index ? how to drop elements from a matrix ?

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I have a matrix b(j,w) = b(3,4)
b= [
0.0913 NaN NaN NaN
0.0913 NaN NaN NaN
0.0913 NaN NaN NaN ]
and g(j,w)=g(3,4)
60 60 60 60
70 70 70 70
75 75 75 75
I want to drop the elements in g that have a correspondent NAN value in b.

Accepted Answer

Wayne King
Wayne King on 30 Nov 2013
Edited: Wayne King on 30 Nov 2013
One of many ways:
b= [
0.0913 NaN NaN NaN
0.0913 NaN NaN NaN
0.0913 NaN NaN NaN ];
g = [60 60 60 60
70 70 70 70
75 75 75 75];
idx = ~isnan(b);
g = g(idx>0);

More Answers (2)

Azzi Abdelmalek
Azzi Abdelmalek on 30 Nov 2013
b= [ 0.0913 NaN NaN NaN
0.0913 NaN NaN NaN
0.0913 NaN NaN NaN ]
c=[ 60 60 60 60
70 70 70 70
75 75 75 75]
idx=any(~isnan(b),1)
c=c(:,idx)

Andrei Bobrov
Andrei Bobrov on 30 Nov 2013
b = [0.0913 NaN NaN NaN
0.0913 NaN NaN NaN
0.0913 NaN NaN NaN];
g = [60 60 60 60
70 70 70 70
75 75 75 75];
>> g(~isnan(b))
ans =
60
70
75

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