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how to deal with this error??

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Good mind
Good mind 2017-12-26
编辑： Good mind 2018-5-27
When i write the code i get *The variable'DG4' appears to change size on every loop iteration(within a script). Consider preallocating for speed
What should i do??
t4=122;
n4=2000;
for i=1:n4
if abs(d4(i))>t4
DG4(i)=d4(i)-((t4.^2)/d4(i));
end
end
d4 is a signal of 1x2000 double

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Birdman
Birdman 2017-12-26
编辑：Birdman 2017-12-26
At the beginning of the code, write
DG4=zeros(1,2000);
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Image Analyst
Image Analyst 2017-12-26
DG4 is NOT from that code. It's not mentioned anywhere in that code.

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