Mercurial > hg > camir-aes2014
diff 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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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/toolboxes/MIRtoolbox1.3.2/somtoolbox/som_normcolor.m Tue Feb 10 15:05:51 2015 +0000 @@ -0,0 +1,89 @@ +function color = som_normcolor(data, clrmap) + +%SOM_NORMCOLOR RGB values of indexed colors for a given dataset and colormap +% +% color = som_normcolor(data, [clrmap]) +% +% color = som_normcolor(data); +% color = som_normcolor(data,jet(64)); +% +% Input and output arguments ([]'s are optional): +% data (struct) map or data struct +% (matrix) size N x dim +% [clrmap] (matrix) size N x 3, a valid colormap (an RGB value matrix) +% Default is current colormap. See COLORMAP. +% +% color (matrix) size N x 3 x dim, RGB matrix +% +% Purpose of this function is to calculate fixed RGB colors that are similar +% to indexed colors with the specified colormap. This is because some +% SOM Toolbox visualization functions (as SOM_GRID) do not use indexed colors +% if the underlying Matlab function (e.g. PLOT) do not use indexed colors +% +% EXAMPLE +% +% %%% Visualize three variables in a map using som_grid: +% %%% Give coordinates for the markers according to variables 1 and 2, and +% %%% 'indexed colors' according to variable 3. +% +% som_grid(map.topol.lattice,map.topol.msize,'Coord',map.codebook(:,1:2), ... +% 'markercolor', som_normcolor(map.codebook(:,3))); + +% Contributed to SOM Toolbox 2.0, February 11th, 2000 by Johan Himberg +% Copyright (c) by Johan Himberg +% http://www.cis.hut.fi/projects/somtoolbox/ + +% juha 150799 johan 010999 + +%%%% check possible errors %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% + +error(nargchk(1,2,nargin)); + +if nargin < 2| isempty(clrmap), + clrmap=colormap; +elseif ~vis_valuetype(clrmap,{'nx3rgb'}), + error('The specified colormap is invalid!'); +end + +d=size(clrmap,1); + +if isstruct(data), + m_names={'type';'codebook';'topol';'labels';'neigh';'mask';'trainhist';... + 'name';'comp_names';'comp_norm'}; + d_names=fieldnames(vis_struct); + if length(fieldnames(data)) ~= length(d_names) % data is not som_data_struct + if length(fieldnames(data)) ~= length(m_names) % and not som_map_struct + error('Input argument is not a ''som_vis'' or ''som_map'' struct.') + elseif ~all(strcmp(fieldnames(data),m_names)) + error('Input argument is not a ''som_vis'' or ''som_map'' struct.') + else + data=data.codebook; + end + elseif ~all(strcmp(fieldnames(data),dnames)) + error('Input argument is not a ''som_vis'' or ''som_map'' struct.') + else + data=data.data; + end +end + +if ~isnumeric(data) | ndims(data) ~= 2 + error('Data is not 2 dimensional numeric matrix.'); +end + +%%% action %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% + +data=som_normalize(data,'range'); + +for i=1:size(data,2), + inds=~isnan(data(:,i)); + color(inds,:,i)=clrmap(round(data(inds,i)*(d-1))+1,:); + color(~inds,:,i)=NaN; +end + + + + + + + +