openGraphCairo {visStatistics}

Cairo wrapper function

Description

Cairo wrapper function returning NULL if not type is specified

Usage

openGraphCairo(
  width = 640,
  height = 480,
  fileName = NULL,
  type = NULL,
  fileDirectory = getwd(),
  pointsize = 12,
  bg = "transparent",
  canvas = "white",
  units = "px",
  dpi = 150
)

Arguments

width

see Cairo()

height

see Cairo()

fileName

name of file to be created. Does not include both file extension ".type" and file filedirectory. Default file name "visstat_plot".

type

Supported output types are "png", "jpeg", "pdf", "svg", "ps" and "tiff". See Cairo()

fileDirectory

path of directory, where plot is stored. Default current working directory.

pointsize

see Cairo()

bg

see Cairo()

canvas

see Cairo()

units

see Cairo()

dpi

DPI used for the conversion of units to pixels. Default value 150.

Details

openGraphCairo() Cairo() wrapper function. Differences to Cairo: a) prematurely ends the function call to Cairo() returning NULL, if no output type of types "png", "jpeg", "pdf", "svg", "ps" or "tiff" is provided. b) The file argument of the underlying Cairo function is generated by file.path(fileDirectory,paste(fileName,".", type, sep = "")).

Value

NULL, if no type is specified. Otherwise see Cairo()

Examples

##  adapted from example in \code{Cairo()}
openGraphCairo(fileName="normal_dist",type="pdf", fileDirectory=tempdir()) 
plot(rnorm(4000),rnorm(4000),col="#ff000018",pch=19,cex=2) 
dev.off() # creates a file "normal_dist.pdf" in the directory specified in fileDirectory
file.remove(file.path(tempdir(),"normal_dist.pdf"))