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How do I replace this for-loop?
From: |
Robert Macy |
Subject: |
How do I replace this for-loop? |
Date: |
Fri, 04 Jul 2008 14:48:39 -0700 |
What's the best way to replace this for-loop?
Given an array, n, of datapoints, such that:
>> size(n)
rows = 27000
columns = 2
where n(:,1) are all the integer x values, and
n(:,2) are all the integer y values,
both integer values are in the range of 1 to 101
I slowly did it this way:
output=zeros(101,101);
for i=1:27000
output( n(i,1),n(i,2) ) = output( n(i,1),n(i,2) ) + 1;
endfor
as you all know this is fairly slow.
What's a simple way to replace this for-loop?
Robert