MATLAB: ANN Tool in MATLAB

ann

While using Neural network pattern recognition tool(nprtool) in matlab,(For classification after getting all features) first we have to give input data from the workspace as a database file and then it asks for target data defining the desired output. I can't understand that if,i give input the features_vector of an image,then from where can i get the target data_vector?I mean how to estimate the target_data for each feature..

Best Answer

If there are c classes or categories and N examples of I-dimensional inputs.
 [ I N ] = size(input)
 [ c N  ] = size(target)
where the target matrix contains c-dimensional {0,1} unit vectors satisfying
 sum(target)           = ones(1,N)
 vec2ind(target)       = classindices
 ind2vec(classindices) = target
Look at the target vectors of the classification data examples in
 help nndatasets
 doc nndatasets
Hope this helps.
Thank you for formally accepting my answer
Greg
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