Plot a matrix.

'plotMatrix' plots a matrix, decorated with the names of rows and columns, and, if requested, with lines separating specified rows/columns. Also, a legend gets drawn, by default.

plotMatrix(x, col = gray.colors(16), transpose = FALSE, axes = c(2,
    3), legend = TRUE, legend.width = 0.2, legend.nlevels = length(col) +
    1, rowDelim = NULL, rowDelimCol = "black", colDelim = NULL,
    colDelimCol = "black")

Arguments

x	a matrix
col	colors
transpose	transpose the matrix?
axes	which axes (sides of the matrix) to annotate? (1=below, 2=left, 3=above and 4=right).
legend	draw legend?
legend.width	the relative width of the legend to the total width of the plot
legend.nlevels	number of levels in the legend (defaults to the number of colors in 'col')
rowDelim	an optional vector of rows after which to put a separation line
rowDelimCol	the color of the row separation line
colDelim	an optional vector of columns after which to put a separation line
colDelimCol	the color of the column separation line

Examples

x<-matrix(1:36,6)
rownames(x)<-paste('row',1:6)
colnames(x)<-paste('column',1:6)
x
#>       column 1 column 2 column 3 column 4 column 5 column 6
#> row 1        1        7       13       19       25       31
#> row 2        2        8       14       20       26       32
#> row 3        3        9       15       21       27       33
#> row 4        4       10       16       22       28       34
#> row 5        5       11       17       23       29       35
#> row 6        6       12       18       24       30       36
plotMatrix(x)

# group rows and columns
x<-repmat(matrix(3-c(1,2,1,2,3,2,1,2,1),3),3,3)
plotMatrix(x, rowDelim = c(3,6), colDelim = c(3,6), colDelimCol='red')