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From: Luna Moon on 25 Jun 2010 14:11
K>> subs = [1; 2; 4; 2; 4];
A = accumarray(subs, 101:105)

A =

101
206
0
208

Why is that? I just don't get it...
From: Sean on 25 Jun 2010 14:24
Luna Moon <lunamoonmoon(a)gmail.com> wrote in message <f85233fc-b174-48a9-be24-f4fdaf2d5a67(a)e5g2000yqn.googlegroups.com>...
> K>> subs = [1; 2; 4; 2; 4];
> A = accumarray(subs, 101:105)
>
> A =
>
> 101
> 206
> 0
> 208
>
> Why is that? I just don't get it...

Every time a sub encountered it's corresponding value is added. (The default function is plus)
Thus there is one 1 summing to 101. 2 sums 102,104 = 206;4 sums 103,105=208. There are no 3s so it doesn't get anything.
From: Matt Fig on 25 Jun 2010 14:28
For this simple case,

% DATA
subs = [1; 2; 4; 2; 4];
val = [101;102;103;104;105];


% ENGINE
A = zeros(max(subs),1);

for ii = 1:length(subs)
A(subs(ii)) = A(subs(ii)) + val(ii);
end
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