sna (version 0.41)

plot.matrix: Plot Matrices Using a Color/Intensity Grid

Description

Plots a matrix, m, associating the magnitude of the i,jth cell of m with the color of the i,jth cell of an nrow(m) by ncol(m) grid.

Usage

plot.matrix(x, labels=list(seq(1:dim(x)[1]), seq(1:dim(x)[2])), 
    drawlab=TRUE, diaglab=TRUE, ...)

Arguments

x

An input matrix

labels

A list containing the vectors of row and column labels (respectively)

drawlab

Add labels to the plot?

diaglab

Label the diagonal?

...

Additional arguments to plot

Value

• None

Details

plot.matrix is particularly valuable for examining large adjacency matrices, whose structure can be non-obvious otherwise.

Examples

#Plot a small adjacency matrix
plot.matrix(rgraph(5))

#Plot a much larger one
plot.matrix(rgraph(100),drawlab=FALSE,diaglab=FALSE)