scripts/builtin/msvmPredict.dml

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# This Scripts helps in applying an trained MSVM

# INPUT PARAMETERS:
# ---------------------------------------------------------------------------------------------
# NAME            TYPE    DEFAULT     MEANING
# ---------------------------------------------------------------------------------------------
# X               Double  ---         matrix X of feature vectors to classify
# W               Double  ---         matrix of the trained variables
# ---------------------------------------------------------------------------------------------
# OUTPUT:
# ---------------------------------------------------------------------------------------------
# NAME            TYPE    DEFAULT     MEANING
# ---------------------------------------------------------------------------------------------
# Y^              Double  ---         Classification Labels Raw, meaning not modified to clean
#                                     Labeles of 1's and -1's
# Y               Double  ---         Classification Labels Maxed to ones and zeros.

m_msvmPredict = function(Matrix[Double] X, Matrix[Double] W)
  return(Matrix[Double] YRaw, Matrix[Double] Y)
{
  if(ncol(X) != nrow(W)){
    if(ncol(X) + 1 != nrow(W)){
      stop("MSVM Predict: Invalid shape of W ["+ncol(W)+","+nrow(W)+"] or X ["+ncol(X)+","+nrow(X)+"]")
    }
    YRaw = X %*% W[1:ncol(X),] + W[ncol(X)+1,]
    Y = rowIndexMax(YRaw)
  }
  else{
    YRaw = X %*% W
    Y = rowIndexMax(YRaw)
  }
}