multiplot {scater} | R Documentation

## Multiple plot function for ggplot2 plots

### Description

Place multiple `ggplot` plots on one page.

### Usage

    multiplot(..., plotlist = NULL, cols = 1, layout = NULL)

### Arguments

`...` | One or more ggplot objects.
`plotlist` | A list of ggplot objects, as an alternative to `...`.
`cols` | A numeric scalar giving the number of columns in the layout.
`layout` | A matrix specifying the layout. If present, `cols` is ignored.

### Details

If the layout is something like `matrix(c(1,2,3,3), nrow=2, byrow=TRUE)`, then:

- plot 1 will go in the upper left;

- plot 2 will go in the upper right;

- and plot 3 will go all the way across the bottom.

There is no way to tweak the relative heights or widths of the plots with this simple function. It was adapted from http://www.cookbook-r.com/Graphs/Multiple_graphs_on_one_page_(ggplot2)/

### Value

A ggplot object.

### Examples

    library(ggplot2)

    ## This example uses the ChickWeight dataset, which comes with ggplot2
    ## First plot
    p1 <- ggplot(ChickWeight, aes(x = Time, y = weight, colour = Diet, group = Chick)) +
       geom_line() +
       ggtitle("Growth curve for individual chicks")
    ## Second plot
    p2 <- ggplot(ChickWeight, aes(x = Time, y = weight, colour = Diet)) +
       geom_point(alpha = .3) +
       geom_smooth(alpha = .2, size = 1) +
       ggtitle("Fitted growth curve per diet")

    ## Third plot
    p3 <- ggplot(subset(ChickWeight, Time == 21), aes(x = weight, colour = Diet)) +
       geom_density() +
       ggtitle("Final weight, by diet")
    ## Fourth plot
    p4 <- ggplot(subset(ChickWeight, Time == 21), aes(x = weight, fill = Diet)) +
        geom_histogram(colour = "black", binwidth = 50) +
       facet_grid(Diet ~ .) +
       ggtitle("Final weight, by diet") +
       theme(legend.position = "none")        # No legend (redundant in this graph)

    ## Combine plots and display
    multiplot(p1, p2, p3, p4, cols = 2)

[Package scater version 1.12.2 Index]