plot.cor {sma}R Documentation

Red and Green Color Image of Correlation Matrix


This function produces a red and green color image of a correlation matrix using an RGB color specification. Increasingly positive correlations are represented with reds of increasing intensity, and increasingly negative correlations are represented with greens of increasing intensity.


plot.cor(x, new=FALSE, nrgcols=50, labels=FALSE, labcols=1, title="", ...)


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 specified for the label of each column of X.
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).


Sandrine Dudoit,

See Also

plot.mat,rgcolors.func,, cor, image, rgb.

[Package sma version 0.5.15 Index]