diff core/tools/machine_learning/svmlight2weight.m @ 0:e9a9cd732c1e tip

first hg version after svn

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/core/tools/machine_learning/svmlight2weight.m	Tue Feb 10 15:05:51 2015 +0000
@@ -0,0 +1,23 @@
+function w = svmlight2weight(modelfile)
+% returns the dual weight vecor for a given svm model
+%
+% All the script does is compute the weighted sum of the support vectors
+% (first element in line is alpha*y, what follows is the feature vector).
+% For further info, see the comment in the model file for its format. 
+
+tagstr = python('svmlight2weight.py', modelfile);
+
+[firstidx] = strfind(tagstr, '1 :');
+
+%get start of vector description
+tagstr = tagstr(firstidx:end);
+
+% parse text function output
+vecs = textscan(tagstr,'%d %f','Delimiter',':');
+
+% initialise
+w = zeros(max(vecs{1}),1);
+
+% set values
+w(vecs{1}) = vecs{2};
+