group data into categories which display the category name

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Ollie Bliss 2013-7-2

I have a 26,000 long dataset of degrees (angle 0-360).

I want these categories 0-90 = A 90-180 = B 180-270 = C 270-360 = D

(A, B, C, D are strings).

what loop do I need to run through the data set and display the four letter for each category. I.e. to form the dataset:

A C D B B B A D C D D D C C A B D C D A .............. etc

Azzi Abdelmalek 2013-7-2

编辑：Azzi Abdelmalek 2013-7-2

data=[25 90 95 185 275 360];
s='ABCD',
idx=ceil(data/90)
idx(idx==0)=1;
out=s(idx)

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