R: Draw a Boxplot for each Column (Row) of a Matrix

boxplot.matrix {graphics} | R Documentation

## Draw a Boxplot for each Column (Row) of a Matrix

### Description

Interpreting the columns (or rows) of a matrix as different groups, draw a boxplot for each.

### Usage

    ## S3 method for class 'matrix'
    boxplot(x, use.cols = TRUE, ...)

### Arguments

`x` | a numeric matrix.
`use.cols` | logical indicating if columns (by default) or rows (`use.cols = FALSE`) should be plotted.
`...` | Further arguments to `boxplot`.

### Value

A list as for `boxplot`.

### Author(s)

Martin Maechler, 1995, for S+, then R package sfsmisc.

### See Also

`boxplot.default` which already works nowadays with data.frames; `boxplot.formula`, `plot.factor` which work with (the more general concept) of a grouping factor.

### Examples

    ## Very similar to the example in ?boxplot
    mat <- cbind(Uni05 = (1:100)/21, Norm = rnorm(100),
                 T5 = rt(100, df = 5), Gam2 = rgamma(100, shape = 2))
    boxplot(mat, main = "boxplot.matrix(...., main = ...)",
            notch = TRUE, col = 1:4)

[Package graphics version 3.5.1 Index]