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Switch between rows & columns indices and vector-like indices of matrices.

rowcol2idx get indices out of rows and columns
idx2col get columns out of indices
idx2row get rows out of indices

Usage

rowcol2idx(rows.idx, cols.idx, height)

idx2col(idx, height)

idx2row(idx, height)

Arguments

rows.idx

indices of rows

cols.idx

indices of columns

height

height of the matrix (number of rows)

idx

vector-like, matrix-wide indices

Value

a vector of indices