VGAM (version 1.1-6)

Rcim: Mark the Baseline of Row and Column on a Matrix data


Rearrange the rows and columns of the input so that the first row and first column are baseline. This function is for rank-zero row-column interaction models (RCIMs; i.e., general main effects models).


Rcim(mat, rbaseline = 1, cbaseline = 1)



Matrix, of dimension \(r\) by \(c\). It is best that it is labelled with row and column names.

rbaseline, cbaseline

Numeric (row number of the matrix mat) or character (matching a row name of mat) that the user wants as the row baseline or reference level. Similarly cbaseline for the column.


Matrix of the same dimension as the input, with rbaseline and cbaseline specifying the first rows and columns. The default is no change in mat.


This is a data preprocessing function for rcim. For rank-zero row-column interaction models this function establishes the baseline (or reference) levels of the matrix response with respect to the row and columns---these become the new first row and column.

See Also

moffset, rcim, plotrcim0.


Run this code
(alcoff.e <- moffset(alcoff, roffset = "6", postfix = "*"))
(aa <- Rcim(alcoff,    rbaseline = "11", cbaseline = "Sun"))
(bb <- moffset(alcoff,             "11",             "Sun", postfix = "*"))
aa - bb  # Note the difference!
# }

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