how to index a column matrix based on other column matrix?

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EM geo
EM geo on 11 Nov 2019
Commented: Ajay Pattassery on 14 Nov 2019
Hi! I have two column matrix of different lenght (B is little than A). i want to indexing B using values from A and create a new column matrix C with the selected values.
I attached my matrices.
Thanks in advance!
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Stephen23
Stephen23 on 11 Nov 2019
Hopefully those are not timesamps stored as integers!
It is not clear what you mean by indexing, given that the values are on the order of 1e7 - 1e8 and yet the arrays have only hundred or so elements. Perhaps you really mean some set operation e.g. setdiff or to find the indices of matching/non-matching values?
Ajay Pattassery
Ajay Pattassery on 14 Nov 2019
I have inspected your vectors. Could you explain how the new column matrix C is created.

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