Remove zeros and perform calculation with non-zero elements

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Damith
Damith 2014-6-2
评论： Damith 2014-6-2
Hi,
I have a array of B with 403 elements (403 x 1). Some of the values are qual to zero but I want to remove the zeros from the array and perform a calculation with non-zero elements. After the calculation with non-zero elements, the new values need to be replaced with old values.
Can anybody help me how I can do it MATLAB?
Thanks,
Dumindu.

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回答（2 个）

Sean de Wolski
Sean de Wolski 2014-6-2
编辑：Sean de Wolski 2014-6-2
Extract the elements in C where B is nonzero
D = C(B~=0)
Extract the nonzero elements of B into D
D = nonzeros(B)
per isakson
per isakson 2014-6-2
编辑：per isakson 2014-6-2
Hint
B(not(B==0)) = perform_calculation( B(not(B==0)) );
where
function M2 = perform_calculation( M1 )
% calculations
end
If calculations use more variables make perform_calculation a nested function to make the variables of the caller available to calculations.

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