savepng {geneplotter} | R Documentation

## Save the contents of the current graphics device to a file

### Description

Save the contents of the current graphics device to file

### Usage

      savepdf(fn, dir, width=6, asp=1)
      saveeps(fn, dir, width=6, asp=1)
      savepng(fn, dir, width=480, asp=1)
      savetiff(fn, dir, density=360, keeppdf=TRUE, ...)

### Arguments

`fn` | character: name of the output file (without extension). An extension `.pdf`, `.eps`, `.png`, or `.tiff` will be added automatically.
`dir` | character: directory to which the file should be written.
`width` | numeric: width of the image in pixels (png) or inches (pdf, eps).
`asp` | numeric: aspect ratio; height=width*asp.
`density` | pixels per inch (see Details).
`keeppdf` | Should the intermediate PDF file (see Details) be kept? If `FALSE`, it is deleted before the function returns.
`...` | Further arguments that are passed on to `savepdf` (see Details).

### Details

The functions are called for their side effect, writing a graphics file.

`savepdf`, `savepng`, and `saveeps` use the devices `pdf`, `png`, and `postscript`, respectively.

There is currently no TIFF device for R, so `savetiff` works differently. It relies on the external tool `convert` from the ImageMagick software package. First, `savetiff` produces a PDF files with `savepdf`, then uses `system` to invoke `convert` with the parameter `density`. `savetiff` does not check for the existence of `convert` or the success of the system call, and returns silently no matter what.

### Value

Character: name of the file that was written.

### Author(s)

Wolfgang Huber http://www.dkfz.de/abt0840/whuber

### See Also

`dev.copy`, `pdf`, `png`, `postscript`

### Examples

      x = seq(0, 20*pi, len=1000)
      plot(x*sin(x), x*cos(x), type="l")

      try({   ## on some machines, some of the devices may not be available
        c(
          savepdf("spiral", dir=tempdir()),
          savepng("spiral", dir=tempdir()),
          saveeps("spiral", dir=tempdir()),
          savetiff("spiral", dir=tempdir())
         )
      })

[Package geneplotter version 1.5.4 Index]