Function for Calculating Moving sum
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Is there any function to calculate moving sum of a vector? I use "smooth" for calculating the moving average of a vector
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F.
le 16 Juil 2012
I'm sorry but I don't understand "moving sum of a vector" ... Could you explain it and give a little exemple ? thanks
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Image Analyst
le 16 Juil 2012
Modifié(e) : Image Analyst
le 16 Juil 2012
For a "moving" sum - the sum in a window - you can use conv(), or conv2() in two dimensions:
windowWidth = 15; % or whatever.
movingSum = conv(oneDsignal, ones(1, windowWidth));
for the moving average:
windowWidth = 15; % or whatever.
movingAverage = conv(oneDsignal, ones(1, windowWidth) / windowWidth);
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Image Analyst
le 12 Oct 2017
Why wouldn't it? If you replace each element with the average of elements around it, which is what conv() can do, then that's the moving average.
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Jonathan Sullivan
le 16 Juil 2012
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Example: Take a 10 element moving average.
x = rand(1e3,1);
n = 10;
x_moving_average = filter(ones(1,n)/n,1,x);
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