getting 1hertz data from 10 hertz

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Hi,
I have a 10htz data file. I want to convert that into 1htz. Is there an easy way to downshift the points.
for example: Time 0.1, 0.2, -- -- -- 0.9, 1.0, 1.1, 1.2, -- -- 1.9, 2.0.
I want my output to be just 1, 2, 3, --

Accepted Answer

sri satya ravi
sri satya ravi on 10 Jan 2017
There is an easier function in matlab called downsample. That works for me ..
Thanks....!!!

More Answers (1)

Image Analyst
Image Analyst on 24 Sep 2016
You can get what you asked for (in the second half of your question) from your signal like this:
newSignal = signal(10:10:end);
Of course subsampling a signal speeds it up because the time is now shorter, if you're using the same time scale. Instead of a sound playing in (say) 100 seconds, it will now play the complete sound in only 10 seconds - ten times faster than before. To make a signal be 1 Hz instead of 10 Hz on the same time scale you need to stretch things out - add samples, not get rid of them.
  2 Comments
Image Analyst
Image Analyst on 28 Dec 2016
Yes, if you have the Signal Processing Toolbox you can use downsample() though I don't know why you'd need a function to do such a simple thing.

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