Checking if 2D coordinates are within 2D bins then sum Z values

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Benjamin Schuessler
Benjamin Schuessler 2018-10-30
评论： Benjamin Schuessler 2018-10-30
Hi All,
I'm having some difficulty/confusion with using accumarray. I have some polar coordinate data with a 3rd column of intensity, like so.. (polar azimuth intensity)
37.9181 213.8268 0
39.1213 62.7845 0
39.1213 62.7845 7.5725
I also have my binning set up such that each coordinate is binned to 5degrees, like so.. (polar(0:90) azimuth(0:360), binned by 5deg)
0 0 0
0 5 0
0 10 0
...
5 0 0
5 5 0
5 10 0
I'm having trouble with how to check if my coordinate data is within those bins and summing the intensities.
My hope is to have a matrix with the binned coordinates and summed intensities (from raw data) in the 3rd column.
Any guidance will be much appreciated!
(Currently have R2018b)

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采纳的回答

Matt J
Matt J 2018-10-30
编辑：Matt J 2018-10-30
pedges=0:5:90;
aedges=0:5:360;
[P,A]=ndgrid(pedges(1:end-1),aedges(1:end-1));
pbin=discretize(data(:,1),pedges);
abin=discretize(data(:,2),aedges);
Ibin = accumarray([pbin,abin],data(:,3),size(P)) ;
result=[P(:),A(:), Ibin(:)]

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