prtDecisionMap
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anaritam commented
What's the difference between
classifier = prtClassKnn + prtDecisionMap;
and
classifier = prtClassKnn;
classifier.internalDecider= prtDecisionMap; ???
Because I'm getting very different results in terms of classification between this 2...
Thanks
kennethmorton commented
The following test code obtains the same results from both methods. Internal deciders are primarily used for plotting decision boundaries in an easy way. In almost all other cases it is preferable to use the + operator to form an algorithm.
I suspect your output mismatch is caused by other differences in the code.
Kenny
ds = prtDataGenMarysSimpleSixClass;
classifierPlusDecider = prtClassKnn + prtDecisionMap;
classifierInternalDecider = prtClassKnn('internalDecider',prtDecisionMap);
trainedPlus = train(classifierPlusDecider, ds);
trainedInternal = train(classifierInternalDecider, ds);
outPlus = run(trainedPlus, ds);
outInternal = run(trainedInternal, ds);
plot(1:outPlus.nObservations,outPlus.X,1:outInternal.nObservations,outInternal.X)
isequal(outPlus.X,outInternal.X) % Yields true