annotate general/arrutils/accumhist.m @ 61:eff6bddf82e3
tip
Finally implemented perceptual brightness thing.
| author |
samer |
| date |
Sun, 11 Oct 2015 10:20:42 +0100 |
| parents |
a5b8bd686246 |
| children |
|
| rev |
line source |
|
samer@54
|
1 function H=accumhist(I,W,D)
|
|
samer@54
|
2 % accumhist - Just like accumarray but filters out rows with nans or infs
|
|
samer@54
|
3 %
|
|
samer@54
|
4 % accumhist ::
|
|
samer@54
|
5 % [[N,E]->(natural|nan|inf|-inf)] ~'N rows of E-dim array indices',
|
|
samer@54
|
6 % ([[N]->real] | real) ~'the weights associated with each row',
|
|
samer@54
|
7 % D:[[E]->natural] ~'the size of the array to return'
|
|
samer@54
|
8 % -> [[D]].
|
|
samer@54
|
9 %
|
|
samer@54
|
10 % Note that unlike with accumarray and other Matlab builtins, the size
|
|
samer@54
|
11 % argument D can be a single element, eg [M], indicating that a vector
|
|
samer@54
|
12 % is desired. accumarry would require [M 1].
|
|
samer@54
|
13
|
|
samer@55
|
14 K=all(isfinite(I),2);
|
|
samer@56
|
15 if ~isscalar(W), W=W(K); end
|
|
samer@56
|
16 H = accumarray(I(K,:),W,tosize(D));
|
|
samer@54
|
17
|
