copying specific elements of an array to another.

Hi, I want to copy certain values from an array with a known size to an array with an unspesified size based on the critaria.

for i=1:length(y)

if abs(y(i))>0.001

y(i)=g(i);

end

end

So basically, I want to get all values in the array y that are greater than 0.001 to be copied into a seperate array g, but I'm struggling. Thanks in advance!

Answer 1

[Stephen23]

Forget about loops, the simple and efficient MATLAB approach is to use logical indexing:

g = y(y>0.001)

Answer 2

[Awais Saeed]

y = reshape(randn(3)/100,1,[]);
idx = 0;
for col = 1:1:size(y,2)
    if (y(col) > 0.001)
        idx = idx+1;
        g(idx) = y(col);    % store values > 0.001 in g
    end
end
fprintf('y: ')
fprintf('%f ', y)           % original data
fprintf('\ng: ')
fprintf('%f ', g)           % values > 0.001