comparison toolboxes/FullBNT-1.0.7/KPMtools/assign_cols.m @ 0:e9a9cd732c1e tip

first hg version after svn

+function M = assign_cols(cols, vals, M)
+% ASSIGN_COLS Assign values to columns of a matrix
+% function M = assign_cols(M, cols, vals, M)
+%
+% Example:
+% M = assign_cols(data, ones(1,N))
+% will construct a 1-of-K encoding of the data, where K=ncols=max(data) and N=nrows=length(data)
+%
+% Example:
+% M = zeros(3,2);
+% M = assign_cols([1 2 1], [10 20 30], M)
+% is equivalent to
+% M(1, 1) = 10
+% M(2, 2) = 20
+% M(3, 1) = 30
+%
+
+if nargin < 3
+  nr = length(cols);
+  nc = max(cols);
+  M = zeros(nr, nc);
+else
+  [nr nc] = size(M);
+end
+
+if 0
+for r=1:nr
+  M(r, cols(r)) = vals(r);
+end
+end
+
+if 1
+rows = 1:nr;
+ndx = subv2ind([nr nc], [rows(:) cols(:)]);
+M(ndx) = vals;
+end