VGAM: Rcim – R documentation

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Rcim

Mark the Baseline of Row and Column on a Matrix data

Description

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).

Usage

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

Arguments

`mat`	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.

Details

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.

Value

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.

Note

This function is similar to moffset; see moffset for information about the differences. If numeric, the arguments rbaseline and cbaseline differ from arguments roffset and coffset in moffset by 1 (when elements of the matrix agree).

Author(s)

Alfian F. Hadi and T. W. Yee.

Examples

(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!

VGAM

Vector Generalized Linear and Additive Models

v1.1-5

GPL-3

Authors

Thomas Yee [aut, cre], Cleve Moler [ctb] (author of several LINPACK routines)

Initial release

2021-01-13