making different signals equal in length
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Hi, I am working with a set of data and i need all of them to be the same length. how can i do this?
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Jan
2012-12-3
0 个投票
It depends. As said already you can crop the longer ones, pad the shorter ones or apply an interpolation. For the latter there are linear, cubic, spline, bsline, trigonometric and more complicated interpolation methods.
2 个评论
Walter Roberson
2015-6-1
Find the maximum of their lengths, say maxlen. Then for each,
ifft(fft(TheSignal),maxlen)
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Walter Roberson
2012-12-3
S1 = size(FirstMatrix);
S2 = size(SecondMatrix);
MaxS = max(S1, S2);
if MaxS(1) > S1(1); FirstMatrix(end+1:MaxS(1), :) = 0; end
if MaxS(2) > S1(2); FirstMatrix(:, end+1:MaxS(2)) = 0; end
if MaxS(1) > S2(1); SecondMatrix(end+1:MaxS(1), :) = 0; end
if MaxS(2) > S2(2); SecondMatrix(:, end+1:MaxS(2)) = 0; end
You can simplify this a bit if you are using vectors and you know the orientation of the vectors.
3 个评论
Walter Roberson
2012-12-3
Ah... did you want to do this by clipping the longer ones to the length of the shorter?
Lisa Justin
2012-12-3
编辑：Lisa Justin
2012-12-3
chaitanya
2016-2-27
thanks..it is useful
Muruganandham Subramanian
2012-12-3
0 个投票
Can you provide the data? you can do it by adding zeros, ones, any desirable data to the data having minimum sizes from data having maximum sizes by initializing max. data length caustiously..
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