R: Extracting coordinates from ca and mjca objects.

cacoord {ca} | R Documentation

## Extracting coordinates from ca and mjca objects.

### Description

Extracting standard and principal coordinates as well as various row and column scaling configurations for visual display from `ca` and `mjca` objects.

### Usage

    cacoord(obj,
                   type = c("standard", "principal",
                            "symmetric", "rowprincipal", "colprincipal", "symbiplot",
                            "rowgab", "colgab", "rowgreen", "colgreen"),
                   dim  = NA,
                   rows = NA,
                   cols = NA,
                   ...)

### Arguments

`obj` | A `ca` or `mjca` object returned by `ca` or `mjca`.
`type` | The type of coordinates to extract (`"standard"` or `"principal"`). The remaining options (`"symmetric"`, ..., `"colgreen"`) return the corresponding row/column coordinate configuration for the map scaling options described in `plot.ca` where the corresponding argument is `map`.
`dim` | The dimensions to return. If `NA`, all available dimensions are returned.
`rows` | Logical indicating whether to return the row coordinates (see below for details).
`cols` | Logical indicating whether to return the column coordinates (see below for details).
`...` | Further arguments (ignored).

### Details

The function `cacoord` returns the standard or principal coordinates of a CA or MCA solution. Additionally, row and column scaling configurations for plotting methods can be computed (see `plot.ca` for details).
Note that by default row and column coordinates are computed (i.e. for `(rows=NA&cols=NA)|(rows=TRUE&cols=TRUE)`). Using `rows=TRUE` (and `cols=NA` or `cols=FALSE`) returns a matrix with the row coordinates, and for `cols=TRUE` (and `cols=NA` or `cols=FALSE`) a matrix with the column coordinates is returned.

### Value

A list with the slots `rows` (row coordinates) and `columns` (column coordinates). When computing only row or only column coordinates, a matrix (with the corresponding row or column coordinates) is returned.

### See Also

`ca`,`mjca`,`plot.ca`,`plot.mjca`

[Package ca version 0.70 Index]