Create a scatterplot matrix.

- x
a matrix or

`data.frame`

.- ...
further arguments and graphical parameters to be passed down.

`par("oma")`

will be set appropriately unless supplied (see`graphics::par()`

).- delimiter
a character-vector to distinguish between variables and imputation-indices for imputed variables (therefore,

`x`

needs to have`colnames()`

). If given, it is used to determine the corresponding imputation-index for any imputed variable (a logical-vector indicating which values of the variable have been imputed). If such imputation-indices are found, they are used for highlighting and the colors are adjusted according to the given colors for imputed variables (see`col`

).- main, sub
main and sub title.

- panel
a

`function(x, y, ...{})`

, which is used to plot the contents of each off-diagonal panel of the display.- lower, upper
separate panel functions to be used below and above the diagonal, respectively.

- diagonal
optional

`function(x, ...{})`

to be applied on the diagonal panels.- labels
either a logical indicating whether labels should be plotted in the diagonal panels, or a character vector giving the labels.

- pos.labels
the vertical position of the labels in the diagonal panels.

- cex.labels
the character expansion factor to be used for the labels.

- font.labels
the font to be used for the labels.

- layout
a character string giving the layout of the scatterplot matrix. Possible values are

`"matrix"`

(a matrix-like layout with the first row on top) and`"graph"`

(a graph-like layout with the first row at the bottom).- gap
a numeric value giving the distance between the panels in margin lines.

This function is the workhorse for `marginmatrix()`

and
`scattmatrixMiss()`

.

The graphical parameter `oma`

will be set unless supplied as an
argument.

A panel function should not attempt to start a new plot, since the
coordinate system for each panel is set up by `pairsVIM`

.

The code is based on `graphics::pairs()`

. Starting with
version 1.4, infinite values are no longer removed before passing the
`x`

and `y`

vectors to the panel functions.

M. Templ, A. Alfons, P. Filzmoser (2012) Exploring incomplete
data using visualization tools. *Journal of Advances in Data Analysis
and Classification*, Online first. DOI: 10.1007/s11634-011-0102-y.

`marginmatrix()`

, `scattmatrixMiss()`

Other plotting functions:
`aggr()`

,
`barMiss()`

,
`histMiss()`

,
`marginmatrix()`

,
`marginplot()`

,
`matrixplot()`

,
`mosaicMiss()`

,
`parcoordMiss()`

,
`pbox()`

,
`scattJitt()`

,
`scattMiss()`

,
`scattmatrixMiss()`

,
`spineMiss()`