Rcim {VGAM} | R Documentation

## 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.

### See Also

`moffset`, `rcim`, `plotrcim0`.

### 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!

[Package VGAM version 1.1-1 Index]