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how make multiple cut or crop of time series

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RichardB on 14 Feb 2020
Commented: Star Strider on 14 Feb 2020
I've got multiple time series. One has gaps and was concatenated when exported to a Mat file. Now some of the data was continuous and much longer than the concatenated. I need a way to cut the sections out of the continuous data at known time points and duration. I wanted to do something like this, but it obviously does not work.
SpeedCropped = Speed(1318:1409 1903:2065 2278:2445);
Is it possible? What is the correct syntax or do I have to do this 9 times?


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Accepted Answer

Star Strider
Star Strider on 14 Feb 2020
We do not know the dimensions of ‘Speed’. Assuming it is a vector, to concatenate the indices, enclose them in square brackets:
SpeedCropped = Speed([1318:1409 1903:2065 2278:2445]);
If there are more dimensions, add additional default dimensions, such as for ‘Speed’ being a 2D matrix, where you are addressing the rows:
SpeedCropped = Speed([1318:1409 1903:2065 2278:2445],:);
SpeedCropped = Speed(:,[1318:1409 1903:2065 2278:2445]);
if you are addressing the columns.


Star Strider
Star Strider on 14 Feb 2020
As always, my pleasure!
No worries! Not everything in MATLAB is immediately obvious, and there is a lot to remember about it.

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