Extract certain rows from matrix

Question

Gareth Evans 2015-3-6

评论： Gareth Evans 2015-3-6

Hello,

I have extracted the peak data from a 1x86400 matrix in the workspace (named a) using the following command:

[pks,locs]=findpeaks(a)

This results in 'pks' = 1x14382 and the 'locs' positions for the obtained data (Also sized at 1x14382).

I would like to use the locations (locs) from the above to extract data from another 1x86400 data file (in this case named b).

Whats the best approach to do this?

Answer 1

Andrew Newell 2015-3-6

编辑：Andrew Newell 2015-3-6

Assuming you read the other data file into another_matrix, the answer is

extracted_data = another_matrix(loc);

I suggest you read about Matrix indexing in MATLAB.

Gareth Evans 2015-3-6

Thanks Andrew.