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));endP1 = P1(:,1:min(3,dim)); if dim<3, P1 = [P1, zeros(dlen,3-dim)]; end% projection of codebook vectorsP1_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);endP1_m = P1_m(:,1:min(3,dim)); if dim<3, P1_m = [P1_m, zeros(size(P1_m,1),3-dim)]; endP2_m = cca(sM,P1_m,20); PCol_m = som_coloring(sM); PCol = PCol_m(bmus,:); % outputcPCAarg = {V,me,l};Pdata = [P1, Res4, PCol]; Pproto = [P1_m, Res4_m, PCol_m, P2_m];  return;