comparison toolboxes/MIRtoolbox1.3.2/somtoolbox/som_projections.m @ 0:e9a9cd732c1e tip

first hg version after svn

+function [cPCAarg, Pdata, Pproto] = som_projections(D,sM,bmus)
+
+% SOM_PROJECTIONS Makes different kinds of projections for the data and the prototypes.
+%
+% [cPCAarg, Pdata, Pproto] = som_projections(D,sM,[bmus])
+%
+%      sD      (struct) data struct
+%              (matrix) size dlen x dim
+%      sM      (struct) map struct
+%              (matrix) size munits x dim: prototype vectors
+%      [bmus]  (vector) BMU for each data vector (calculated if not specified)
+%
+%      cPCAarg (cell array) PCA arguments: {V, me, l} from pcaproj function
+%      Pdata   (matrix) size dlen x 7, consisting of 3 projection coordinates from PCA, 
+%                       1 residual from the rest of the PCA-projection coordinates, 
+%                       and 3 color components 
+%      Pproto  (matrix) size dlen x 7, consisting of 3 projection coordinates from PCA, 
+%                       1 residual from the rest of the PCA-projection coordinates, 
+%                       3 color components, and 3 projection coordinates from CCA
+%
+% See also  PCAPROJ, CCA, SAMMON, SOM_PROJECTIONS_PLOT, SOM_COLORING, SOM_COLORCODE, 
+%           SOM_CLUSTERCOLOR, SOM_KMEANCOLOR.
+
+if isstruct(D), 
+    cn = D.comp_names;
+    D = D.data; 
+end
+[dlen dim] = size(D);
+if nargin<3, bmus = som_bmus(sM,D); end
+
+% projection of data
+
+[P0,V,me,l] = pcaproj(D,dim);
+D1 = som_fillnans(D,sM); 
+P1 = pcaproj(D1,V,me); 
+Res4 = zeros(dlen,1); 
+if dim<=3, 
+    Res4 = zeros(dlen,1); 
+else
+    Res4 = sqrt(sum(P1(:,4:end).*P1(:,4:end),2));
+end
+P1 = P1(:,1:min(3,dim)); 
+if dim<3, P1 = [P1, zeros(dlen,3-dim)]; end
+
+% projection of codebook vectors
+
+P1_m = pcaproj(sM,V,me); 
+Res4_m = zeros(dlen,1); 
+if dim<=3, 
+    Res4_m = zeros(dlen,1); 
+else
+    Res4_m = sum(P1_m(:,4:end).*P1_m(:,4:end),2);
+end
+P1_m = P1_m(:,1:min(3,dim)); 
+if dim<3, P1_m = [P1_m, zeros(size(P1_m,1),3-dim)]; end
+
+P2_m = cca(sM,P1_m,20); 
+
+PCol_m = som_coloring(sM); 
+
+PCol = PCol_m(bmus,:); 
+
+% output
+
+cPCAarg = {V,me,l};
+Pdata = [P1, Res4, PCol]; 
+Pproto = [P1_m, Res4_m, PCol_m, P2_m]; 
+ 
+return;
+