copying specific elements of an array to another.

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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!

Accepted Answer

Stephen23
Stephen23 on 21 Aug 2021
Forget about loops, the simple and efficient MATLAB approach is to use logical indexing:
g = y(y>0.001)

More Answers (1)

Awais Saeed
Awais Saeed on 21 Aug 2021
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

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