### Draw and embed grob objects

Source: https://cran.r-project.org/web/packages/ggplotify/vignettes/ggplotify.html

Demonstrates how to draw grob objects using `grid.draw` and embed them within other plots using `pushViewport` and `viewport`.

```R
grid.newpage()
grid.draw(p1)
vp = viewport(x=.35, y=.75, width=.35, height=.3)
pushViewport(vp)
grid.draw(p2)
upViewport()
```

--------------------------------

### Convert base R plots to grob objects

Source: https://cran.r-project.org/web/packages/ggplotify/vignettes/ggplotify.html

Use `as.grob` to convert base R plots generated by functions like `barplot`, `plot`, or `sin` into grob objects. It also supports plots from packages like `vcd` (e.g., `mosaic`) and `lattice` (e.g., `densityplot`).

```R
library("grid")
library("ggplotify")

p1 <- as.grob(~barplot(1:10))
p2 <- as.grob(expression(plot(rnorm(10))))
p3 <- as.grob(function() plot(sin))

library("vcd")
data(Titanic)
p4 <- as.grob(~mosaic(Titanic))

library("lattice")
data(mtcars)
p5 <- as.grob(densityplot(~mpg|cyl, data=mtcars))
```

--------------------------------

### base2grob

Source: https://cran.r-project.org/web/packages/ggplotify/refman/ggplotify.html

Specifically converts base R graphics plots, defined by expressions or formulas, into 'grob' objects.

```APIDOC
## base2grob

### Description
convert base plot to grob object

### Usage
```R
base2grob(x, envir = parent.frame())
```

### Arguments
- `x` (expression or formula or function) - expression or formula of base plot function call, e.g. expression(pie(1:5)) or ~plot(1:10, 1:10); or a function that plots to an R graphics device when called, e.g. function() plot(sqrt)
- `envir` (environment) - environment to search variables

### Value
grob object

### Author(s)
Guangchuang Yu

### Examples
```R
base2grob(~plot(rnorm(10)))
```
```

--------------------------------

### grid2grob

Source: https://cran.r-project.org/web/packages/ggplotify/refman/ggplotify.html

Converts a grid graphics plot call into a 'grob' object.

```APIDOC
## grid2grob

### Description
convert grid plot to grob object

### Usage
```R
grid2grob(plot_call)
```

### Arguments
- `plot_call` (call) - plot function call

### Value
grob object

### Author(s)
Guangchuang Yu
```

--------------------------------

### as.grob

Source: https://cran.r-project.org/web/packages/ggplotify/refman/ggplotify.html

Converts various plot objects, including those from base R, ggplot2, lattice, and other packages, into 'grob' objects for use with the 'grid' package.

```APIDOC
## as.grob

### Description
convert a plot to grob object

### Usage
```R
as.grob(plot, ...)

## S3 method for class 'aplot'
as.grob(plot, ...)

## S3 method for class 'oncoplot'
as.grob(plot, ...)

## S3 method for class 'bbplot'
as.grob(plot, ...)

## S3 method for class 'patchwork'
as.grob(plot, ...)

## S3 method for class 'gglist'
as.grob(plot, ...)

## S3 method for class 'expression'
as.grob(plot, ...)

## S3 method for class 'formula'
as.grob(plot, ...)

## S3 method for class ''function''
as.grob(plot, ...)

## S3 method for class 'ggplot'
as.grob(plot, ...)

## S3 method for class 'meme'
as.grob(plot, ...)

## S3 method for class 'trellis'
as.grob(plot, ...)

## S3 method for class 'eulergram'
as.grob(plot, ...)

## S3 method for class 'Heatmap'
as.grob(plot, ...)

## S3 method for class 'upset'
as.grob(plot, ...)

## S3 method for class 'tmap'
as.grob(plot, ...)

## S3 method for class 'pheatmap'
as.grob(plot, ...)

## S3 method for class 'grob'
as.grob(plot, ...)
```

### Arguments
- `plot` (any) - base or grid plot, or graphic object generated by ggplot, lattice, etc.
- `...` (any) - additional parameter, mostly will be ignored.

### Value
grob object

### Author(s)
Guangchuang Yu

### Examples
```R
as.grob(~barplot(1:10))
```
```

--------------------------------

### Convert grid plot to grob object

Source: https://cran.r-project.org/web/packages/ggplotify/refman/ggplotify.html

Use grid2grob to convert grid plot function calls into grob objects.

```R
grid2grob(plot_call)
```

--------------------------------

### as.ggplot

Source: https://cran.r-project.org/web/packages/ggplotify/refman/ggplotify.html

Converts a plot (base, grid, ggplot, lattice, etc.) into a ggplot object, facilitating its use within the ggplot2 framework.

```APIDOC
## as.ggplot

### Description
convert plot to ggplot object

### Usage
```R
as.ggplot(plot, scale = 1, hjust = 0, vjust = 0, angle = 0, ...)
```

### Arguments
- `plot` (any) - base or grid plot, or graphic generated by ggplot, lattice, etc.
- `scale` (numeric) - scale of the plot to be drawn
- `hjust` (numeric) - horizontal adjustment
- `vjust` (numeric) - vertical adjustment
- `angle` (numeric) - angle to rotate plot
- `...` (any) - additional parameters passed to as.grob

### Value
ggplot object

### Author(s)
Guangchuang Yu

### Examples
```R
as.ggplot(~barplot(1:10))
```
```

--------------------------------

### Align plots using cowplot

Source: https://cran.r-project.org/web/packages/ggplotify/vignettes/ggplotify.html

This snippet shows how to combine plots converted to ggplot objects, including base R plots and ggplot2 plots, using the `plot_grid` function from the `cowplot` package for alignment and arrangement.

```R
library(cowplot)

library(colorspace)
col <- rainbow_hcl(3)
names(col) <- unique(iris$Species)

color <- col[iris$Species]
p6 <- as.ggplot(~plot(iris$Sepal.Length, iris$Sepal.Width, col=color, pch=15))

p7 <- ggplot(iris, aes(Sepal.Length, Sepal.Width, color=Species)) +
    geom_point(shape=15) + scale_color_manual(values=col, name="")

legend <- get_legend(p7)

## also able to annotate base or other plots using ggplot2
library(ggimage)
p8 <- p6 + geom_subview(x=.7, y=.78, subview=legend)

p9 <- as.ggplot(~image(volcano))

plot_grid(p1, p2, p3, p4, p5, p6, p7, p8, p9, ncol=3, labels=LETTERS[1:9])
```

--------------------------------

### Convert base plot to grob object

Source: https://cran.r-project.org/web/packages/ggplotify/refman/ggplotify.html

Use base2grob to convert base R plot expressions or formulas into grob objects. It can also handle functions that generate plots when called.

```R
base2grob(~plot(rnorm(10)))
```

--------------------------------

### Convert base plot to ggplot object

Source: https://cran.r-project.org/web/packages/ggplotify/refman/ggplotify.html

Use as.ggplot to convert base R plots, grid plots, or plots from other libraries into ggplot objects. This is useful for integrating them into the ggplot2 framework.

```R
as.ggplot(~barplot(1:10))
```

--------------------------------

### Convert plot to grob object

Source: https://cran.r-project.org/web/packages/ggplotify/refman/ggplotify.html

as.grob is a generic function to convert various plot objects, including expressions, formulas, ggplot objects, and plots from libraries like lattice or pheatmap, into grob objects.

```R
as.grob(~barplot(1:10))
```

--------------------------------

### Convert plots to ggplot objects

Source: https://cran.r-project.org/web/packages/ggplotify/vignettes/ggplotify.html

The `as.ggplot` function converts various plot types, including base R plots, expressions, and functions, into ggplot objects. This allows for further annotation using ggplot2's capabilities.

```R
library(ggplot2)
p1 <- as.ggplot(~barplot(1:10)) +
    annotate("text", x = .6, y = .5,
             label = "Hello Base Plot", size = 5,
             color = 'firebrick', angle=45)

p2 <- as.ggplot(expression(plot(rnorm(10))))
p3 <- as.ggplot(function() plot(sin))

p4 <- as.ggplot(~mosaic(Titanic))

p5 <- as.ggplot(densityplot(~mpg|cyl, data=mtcars))
```

=== COMPLETE CONTENT === This response contains all available snippets from this library. No additional content exists. Do not make further requests.