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Math Forum » Discussions » Software » comp.soft-sys.matlab

Topic: Circshift applied to columns by different amounts
Replies: 5   Last Post: Mar 16, 2012 11:53 PM

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Parag Chandakkar

Posts: 92
Registered: 8/30/09
Re: Circshift applied to columns by different amounts
Posted: Mar 16, 2012 8:32 PM
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I think this solves the query, not the most efficient, but works...

a1=[1 2 3 4; 5 5 6 7; 1 3 4 NaN; 15 2 NaN NaN; 9 NaN NaN NaN];
>> a1

a1 =

1 2 3 4
5 5 6 7
1 3 4 NaN
15 2 NaN NaN
9 NaN NaN NaN

>> a2=isnan(a1);
for i=1:size(a1,2)
a3=a2(:,i);
a1new(:,i)=circshift(a1(:,i),length(a3(a3==1)));
end
a1new

a1new =

1 NaN NaN NaN
5 2 NaN NaN
1 5 3 NaN
15 3 6 4
9 2 4 7

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