Arguments
x
a matrix of numerical values.
new
If new=F
, x
must already be a correlation
matrix. If new=T
, the correlation matrix for the columns of
x
is computed and displayed in the image.
nrgcols
the number of colors (>= 1) to be used in the red
and green palette.
labels
vector of character strings to be placed at the
tickpoints, labels for the columns of x
.
labcols
colors to be used for the labels of the columns of
x
. labcols
can have either length 1, in which case
all the labels are displayed using the same color, or the same
length as labels
, in which case a color is speci
title
character string, overall title for the plot.
...
graphical parameters may also be supplied as arguments to
the function (see par
). For comparison purposes,
it is good to set zlim=c(-1,1)
.