som_distortion3

som_distortion3 - distortion error elements (quantization...

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SOM Toolbox Online documentation http://www.cis.hut.fi/projects/somtoolbox/ som_distortion3 [Err,sPropTotal,sPropMunits,sPropComps] = som_distortion3(sM,D,rad) SOM_DISTORTION3 Map distortion measures. [sE,Err] = som_distortion3(sM,[D],[rad]); sE = som_distortion3(sM); Input and output arguments ([]'s are optional): sM (struct) map struct [D] (matrix) a matrix, size dlen x dim (struct) data or map struct by default the map struct is used [rad] (scalar) neighborhood radius, looked from sM.trainhist by default, or = 1 if that has no valid values Err (matrix) size munits x dim x 3
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Unformatted text preview: distortion error elements (quantization error, neighborhood bias, and neighborhood variance) for each map unit and component sPropTotal (struct) .n = length of data .h = mean neighborhood function value .err = errors sPropMunits (struct) .Ni = hits per map unit .Hi = sum of neighborhood values for each map unit .Err = errors per map unit sPropComps (struct) .e1 = total squared distance to centroid .eq = total squared distance to BMU .Err = errors per component See also SOM_QUALITY. [ SOM Toolbox online doc ]...
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