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From: nooknickgigga korbenjawan on 2 Mar 2010 09:59
%in order to cut the whole columns which contain NaN, i done by :

ret=price2ret(data,[],'periodic');
sumret=sum(ret);
findnan=isnan(sumret);
[m n]=size(findnan);
for i=1:n;
if findnan(1,i)==1;
ret(:,i)=[];
else
end
end

%it shows ??? Index of element to remove exceeds matrix
dimensions.
%Moreover, i've tried to cut the whole column of unmovement data out of my file by :

p=input('Enter number of period for non moving price ');
for a=1:m-p
for b=1:n
if sum(ret(a:a+p,b))==ret(a,b)*p;
ret(:,b)=[];
end
end
end

%but it still doesn't cut those column for me.

Anyone please help to see which parts that i did wrong.

thanks
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