Normalize the data from a datamatrix with a specific method.
normalize_samples(datamat, method, ref = NULL, constant = 1000)
data matrix.
string specifying the normalization method. The possible values are:
"sum" normalization by sum.
"median" normalization by median.
"ref.sample" normalization by reference sample.
"ref.feature" normalization by reference feature.
the reference if method is "ref.sample" or "ref.feature".
the constant value if method is "sum".
Returns the data matrix normalized.