Provides a multiple figure array which shows the classification of observations based on
classification methods (e.g. `lda`

, `qda`

) for every combination of two variables.
Moreover, the classification borders are displayed and the apparent error rates are given in each title.

`partimat(x,...)`# S3 method for default
partimat(x, grouping, method = "lda", prec = 100,
nplots.vert, nplots.hor, main = "Partition Plot", name, mar,
plot.matrix = FALSE, plot.control = list(), ...)
# S3 method for data.frame
partimat(x, ...)
# S3 method for matrix
partimat(x, grouping, ..., subset, na.action = na.fail)
# S3 method for formula
partimat(formula, data = NULL, ..., subset, na.action = na.fail)

x

matrix or data frame containing the explanatory variables (required, if `formula`

is not given).

grouping

factor specifying the class for each observation (required, if `formula`

is not given).

formula

formula of the form `groups ~ x1 + x2 + ...`

.
That is, the response is the grouping factor and the right hand side specifies the (non-factor) discriminators.

method

prec

precision used to draw the classification borders (the higher the more precise; default: 100).

data

Data frame from which variables specified in formula are preferentially to be taken.

nplots.vert

number of rows in the multiple figure array

nplots.hor

number of columns in the multiple figure array

subset

index vector specifying the cases to be used in the training sample. (Note: If given, this argument must be named.)

na.action

specify the action to be taken if `NA`

s are
found. The default action is for the procedure to fail. An
alternative is `na.omit`

, which leads to rejection of cases with
missing values on any required variable. (Note: If given, this argument must be named.)

main

title

name

Variable names to be printed at the axis / into the diagonal.

mar

numerical vector of the form `c(bottom, left, top, right)`

which gives the lines of margin to be specified on the four sides of the plot.
Defaults are `rep(0, 4)`

if `plot.matrix = TRUE`

, `c(5, 4, 2, 1) + 0.1`

otherwise.

plot.matrix

logical; if `TRUE`

, like a scatterplot matrix;
if `FALSE`

(default) uses less space and arranges the plots “optimal”
(using a fuzzy algorithm) in an array by plotting each pair of variables once.

plot.control

A list containing further arguments passed to the underlying
plot functions (and to `drawparti`

).

...

Further arguments passed to the classification `method`

(through `drawparti`

).

for much more fine tuning see `drawparti`

# NOT RUN { library(MASS) data(iris) partimat(Species ~ ., data = iris, method = "lda") # } # NOT RUN { partimat(Species ~ ., data = iris, method = "lda", plot.matrix = TRUE, imageplot = FALSE) # takes some time ... # }