| SOM Toolbox | Online documentation | http://www.cis.hut.fi/projects/somtoolbox/ |
color=som_clustercolor(m, class, colorcode)
SOM_CLUSTERCOLOR Sets map unit coloring according to classification
syntax 1: color = som_clustercolor(m, class, [colorcode])
syntax 2: color = som_clustercolor(class, colormatrix)
Input and output arguments ([]'s are optional):
m (struct) map or topol struct
(cell array) of form {str,[m1 m2]} where str = 'hexa'
or 'rect' and [m1 m2] = msize.
class (matrix) Mxn matrix of integers (class labels)
where M is the number of map units and each
column gives some classification for the units.
colorcode (string) 'rgb1', 'rgb2' (default), 'rgb3', 'rgb4', 'hsv'.
colormatrix (matrix) Mx3 matrix of RGB triplets giving the
initial color code for each unit.
color (matrix) size Mx3xn of RGB triplets giving the
resulting color code for each unit
The function gives a color coding by class and location for the
map units. The color is determined by calculating the mean of the
initial RGB values of units belonging to the same class.
Function has two syntaxes:
* If first argument gives the map topology, i.e. is map or topol struct
or cell indicating the topology, the initial color coding of the
units may be given by a string ('rgb1','rgb2','rgb3','rgb4', or 'hsv')
which describe a predefined coloring scheme. (see SOM_COLORCODE).
or an initial color matrix of size Mx3 with RGB triplets as rows.
* Another possibility is to give just the classification vector
of size Mx1 and an initial color matrix of size Mx3 with RGB
triplets as rows.
EXAMPLE (requires Matlab Statistics Toolbox)
% Do a 10-cluster single linkage hierachical clustering for SOM units
class=cluster(linkage(pdist(sM.codebook),'single'),10);
% Color code the clusters
C=som_clustercolor(sM, class, 'rgb2');
% Visualize
som_show(sM,'color',C);
See also SOM_COLORCODE, SOM_KMEANSCOLOR, SOM_CPLANE, SOM_SHOW