Function for Calculating Moving sum
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John
el 16 de Jul. de 2012
Comentada: Image Analyst
el 12 de Oct. de 2017
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.
el 16 de Jul. de 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
el 16 de Jul. de 2012
Editada: Image Analyst
el 16 de Jul. de 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);
4 comentarios
Image Analyst
el 12 de Oct. de 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
el 16 de Jul. de 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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