i want to read only non zero numerical from the matrix

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suresh
suresh 2012-1-19
a=[0 0 0 0 0 0 0 0 0 0 1 2 3 4 5 6 7 0 0 0]
a(1,11:17)
then it will display
1 2 3 4 5 6 7
is there any code to read non zero numerical automatically

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David
David 2012-1-19
To get the non-zero elements
a(a~=0)
Be careful with the comparison of floats/doubles (some zeros may just be very very small (if there are the result of a calculation) so it may be best to have a compare function:
tol = 1000*sqrt(eps);
cmpTol = @(x) abs(x)<tol;
and do something like
a(~cmpTol(a))

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Walter Roberson
Walter Roberson 2012-1-19

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