downsample
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is there a matlab command that will filter and downsample data?
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Honglei Chen
am 18 Nov. 2011
There are several possibilities. You can use either upfirdn or design the filter using fdesign.decimator and then filter your signal.
doc upfirdn
doc fdesign.decimator
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Walter Roberson
am 18 Nov. 2011
imresize() in the Image Processing Toolbox
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Walter Roberson
am 18 Nov. 2011
There isn't any command for it in basic MATLAB. You may be able to construct routines for it out of basic MATLAB, depending on how you want to do your filtering. For example, you could fft2, adjust the frequency matrix, then ifft2() specifying fewer points than the original had.
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