Mercurial > hg > camir-aes2014
comparison toolboxes/MIRtoolbox1.3.2/somtoolbox/som_normcolor.m @ 0:e9a9cd732c1e tip
first hg version after svn
author | wolffd |
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date | Tue, 10 Feb 2015 15:05:51 +0000 |
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-1:000000000000 | 0:e9a9cd732c1e |
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1 function color = som_normcolor(data, clrmap) | |
2 | |
3 %SOM_NORMCOLOR RGB values of indexed colors for a given dataset and colormap | |
4 % | |
5 % color = som_normcolor(data, [clrmap]) | |
6 % | |
7 % color = som_normcolor(data); | |
8 % color = som_normcolor(data,jet(64)); | |
9 % | |
10 % Input and output arguments ([]'s are optional): | |
11 % data (struct) map or data struct | |
12 % (matrix) size N x dim | |
13 % [clrmap] (matrix) size N x 3, a valid colormap (an RGB value matrix) | |
14 % Default is current colormap. See COLORMAP. | |
15 % | |
16 % color (matrix) size N x 3 x dim, RGB matrix | |
17 % | |
18 % Purpose of this function is to calculate fixed RGB colors that are similar | |
19 % to indexed colors with the specified colormap. This is because some | |
20 % SOM Toolbox visualization functions (as SOM_GRID) do not use indexed colors | |
21 % if the underlying Matlab function (e.g. PLOT) do not use indexed colors | |
22 % | |
23 % EXAMPLE | |
24 % | |
25 % %%% Visualize three variables in a map using som_grid: | |
26 % %%% Give coordinates for the markers according to variables 1 and 2, and | |
27 % %%% 'indexed colors' according to variable 3. | |
28 % | |
29 % som_grid(map.topol.lattice,map.topol.msize,'Coord',map.codebook(:,1:2), ... | |
30 % 'markercolor', som_normcolor(map.codebook(:,3))); | |
31 | |
32 % Contributed to SOM Toolbox 2.0, February 11th, 2000 by Johan Himberg | |
33 % Copyright (c) by Johan Himberg | |
34 % http://www.cis.hut.fi/projects/somtoolbox/ | |
35 | |
36 % juha 150799 johan 010999 | |
37 | |
38 %%%% check possible errors %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% | |
39 | |
40 error(nargchk(1,2,nargin)); | |
41 | |
42 if nargin < 2| isempty(clrmap), | |
43 clrmap=colormap; | |
44 elseif ~vis_valuetype(clrmap,{'nx3rgb'}), | |
45 error('The specified colormap is invalid!'); | |
46 end | |
47 | |
48 d=size(clrmap,1); | |
49 | |
50 if isstruct(data), | |
51 m_names={'type';'codebook';'topol';'labels';'neigh';'mask';'trainhist';... | |
52 'name';'comp_names';'comp_norm'}; | |
53 d_names=fieldnames(vis_struct); | |
54 if length(fieldnames(data)) ~= length(d_names) % data is not som_data_struct | |
55 if length(fieldnames(data)) ~= length(m_names) % and not som_map_struct | |
56 error('Input argument is not a ''som_vis'' or ''som_map'' struct.') | |
57 elseif ~all(strcmp(fieldnames(data),m_names)) | |
58 error('Input argument is not a ''som_vis'' or ''som_map'' struct.') | |
59 else | |
60 data=data.codebook; | |
61 end | |
62 elseif ~all(strcmp(fieldnames(data),dnames)) | |
63 error('Input argument is not a ''som_vis'' or ''som_map'' struct.') | |
64 else | |
65 data=data.data; | |
66 end | |
67 end | |
68 | |
69 if ~isnumeric(data) | ndims(data) ~= 2 | |
70 error('Data is not 2 dimensional numeric matrix.'); | |
71 end | |
72 | |
73 %%% action %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% | |
74 | |
75 data=som_normalize(data,'range'); | |
76 | |
77 for i=1:size(data,2), | |
78 inds=~isnan(data(:,i)); | |
79 color(inds,:,i)=clrmap(round(data(inds,i)*(d-1))+1,:); | |
80 color(~inds,:,i)=NaN; | |
81 end | |
82 | |
83 | |
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