# boxplot.matrix

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

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

- Keywords
- hplot

##### Usage

```
# S3 method for 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`

.

##### 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

`library(graphics)`

```
# NOT RUN {
## 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)
# }
```

*Documentation reproduced from package graphics, version 3.6.1, License: Part of R 3.6.1*

### Community examples

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