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#' Open a postscript device with the color scheme given by geoplotpalette.
#'
#' The function starts a postscript device and the arguments are the same as
#' the arguments to postscript (height, width, file, bg etc).
#'
#' <!--explain details here-->
#'
#' @param ... The arguments to postscript are optional. See help postscript.
#' @return No value returned.
#' @section Side Effects: A graphics device is opened (often a file). It must
#' be closed again by dev.off()
#' @seealso postscript, geoplotpalette,litir
#' @keywords <!--Put one or more s-keyword tags here-->
#' @examples
#'
#' \dontrun{
#' colps(file="map1.ps",height=6,width=5)
#' geoplot(xlim=c(-28,-10),ylim=c(64,69))
#' geosymbols(data,z=data$value,circles=0.2,sqrt=T)
#' geopolygon(island,col="white")# paint white over the symbols
#' geolines(island) # that are inside the country. (island)
#' dev.off()
#'
#' # same example in a different way.
#' colps(file="map1.ps",height=6,width=5,bg="white")
#' geoplot(xlim=c(-28,-10),ylim=c(64,69))
#' geosymbols(data,z=data$value,circles=0.2,sqrt=T)
#' geopolygon(island,col=0)#col 0 is now white
#' geolines(island) # was transparent earlier
#' dev.off()
#' }
#' @export colps
colps <-
function(...){
postscript(...)
geoplotpalette()
}
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