This function reduce matrix provided by the user deleting missing categories, those j where sum(datatable[j,]) = sum(datatable[,j]) = 0. Also provide a list of the categories deleted and provides the new size of the problem
GetM1(datatable)## S3 method for class 'GetM1'print(x,...)
Arguments
datatable: Matrix. Expected to be square matrix with at least 2 rows (columns), non negative values and at least an element different of zero.