R : Copyright 2005, The R Foundation for Statistical Computing
Version 2.1.1  (2005-06-20), ISBN 3-900051-07-0

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> ### * <HEADER>
> ###
> attach(NULL, name = "CheckExEnv")
> assign(".CheckExEnv", as.environment(2), pos = length(search())) # base
> ## add some hooks to label plot pages for base and grid graphics
> setHook("plot.new", ".newplot.hook")
> setHook("persp", ".newplot.hook")
> setHook("grid.newpage", ".gridplot.hook")
> 
> assign("cleanEx",
+        function(env = .GlobalEnv) {
+ 	   rm(list = ls(envir = env, all.names = TRUE), envir = env)
+            RNGkind("default", "default")
+ 	   set.seed(1)
+    	   options(warn = 1)
+ 	   delayedAssign("T", stop("T used instead of TRUE"),
+ 		  assign.env = .CheckExEnv)
+ 	   delayedAssign("F", stop("F used instead of FALSE"),
+ 		  assign.env = .CheckExEnv)
+ 	   sch <- search()
+ 	   newitems <- sch[! sch %in% .oldSearch]
+ 	   for(item in rev(newitems))
+                eval(substitute(detach(item), list(item=item)))
+ 	   missitems <- .oldSearch[! .oldSearch %in% sch]
+ 	   if(length(missitems))
+ 	       warning("items ", paste(missitems, collapse=", "),
+ 		       " have been removed from the search path")
+        },
+        env = .CheckExEnv)
> assign("..nameEx", "__{must remake R-ex/*.R}__", env = .CheckExEnv) # for now
> assign("ptime", proc.time(), env = .CheckExEnv)
> grDevices::postscript("pixmap-Examples.ps")
> assign("par.postscript", graphics::par(no.readonly = TRUE), env = .CheckExEnv)
> options(contrasts = c(unordered = "contr.treatment", ordered = "contr.poly"))
> options(warn = 1)    
> library('pixmap')
> 
> assign(".oldSearch", search(), env = .CheckExEnv)
> assign(".oldNS", loadedNamespaces(), env = .CheckExEnv)
> cleanEx(); ..nameEx <- "addlogo-methods"
> 
> ### * addlogo-methods
> 
> flush(stderr()); flush(stdout())
> 
> ### Name: addlogo-methods
> ### Title: Methods for Adding a Pixmap Logo to a Plot
> ### Aliases: addlogo addlogo-methods addlogo,pixmap-method
> ### Keywords: methods
> 
> ### ** Examples
> 
> x <- read.pnm(system.file("pictures/logo.ppm", package="pixmap")[1])
> plot(x)
> for (i in 1:7)
+   addlogo(x, px=c(0, (101/77)*11), py=c((i-1)*11, i*11), asp=1)
> 
> 
> 
> cleanEx(); ..nameEx <- "channels-methods"
> 
> ### * channels-methods
> 
> flush(stderr()); flush(stdout())
> 
> ### Name: channels-methods
> ### Title: Methods for Channel Manipulation
> ### Aliases: addChannels getChannels addChannels-methods
> ###   getChannels-methods addChannels,pixmapRGB-method
> ###   getChannels,pixmapChannels-method
> ### Keywords: methods
> 
> ### ** Examples
> 
>   x <- pixmapRGB(rep(1:5, 3), nrow=4)
>   plot(x)
>   print(x)
Pixmap image
  Type          : pixmapRGB 
  Size          : 4x4 
  Resolution    : 1x1 
  Bounding box  : 0 0 4 4 

> 
>   getChannels(x)
, , red

     [,1] [,2] [,3] [,4]
[1,] 0.00 1.00 0.75 0.50
[2,] 0.25 0.00 1.00 0.75
[3,] 0.50 0.25 0.00 1.00
[4,] 0.75 0.50 0.25 0.00

, , green

     [,1] [,2] [,3] [,4]
[1,] 0.25 0.00 1.00 0.75
[2,] 0.50 0.25 0.00 1.00
[3,] 0.75 0.50 0.25 0.00
[4,] 1.00 0.75 0.50 0.25

, , blue

     [,1] [,2] [,3] [,4]
[1,] 0.50 0.25 0.00 1.00
[2,] 0.75 0.50 0.25 0.00
[3,] 1.00 0.75 0.50 0.25
[4,] 0.00 1.00 0.75 0.50

>   getChannels(x, colors=c("red", "green"))
, , red

     [,1] [,2] [,3] [,4]
[1,] 0.00 1.00 0.75 0.50
[2,] 0.25 0.00 1.00 0.75
[3,] 0.50 0.25 0.00 1.00
[4,] 0.75 0.50 0.25 0.00

, , green

     [,1] [,2] [,3] [,4]
[1,] 0.25 0.00 1.00 0.75
[2,] 0.50 0.25 0.00 1.00
[3,] 0.75 0.50 0.25 0.00
[4,] 1.00 0.75 0.50 0.25

> 
>   y = addChannels(x)
>   plot(y)
>   print(y)
Pixmap image
  Type          : pixmapGrey 
  Size          : 4x4 
  Resolution    : 1x1 
  Bounding box  : 0 0 4 4 

> 
>   ## extract only the red channel
>   y = addChannels(x, coef=c(1,0,0))
>   plot(y)
> 
> 
> 
> cleanEx(); ..nameEx <- "pixmap"
> 
> ### * pixmap
> 
> flush(stderr()); flush(stdout())
> 
> ### Name: pixmap
> ### Title: Pixmap Images
> ### Aliases: pixmap pixmapRGB pixmapGrey pixmapIndexed plot,pixmap-method
> ###   show,pixmap-method [,pixmap-method
> ### Keywords: color
> 
> ### ** Examples
> 
>  ## A simple example
>  x <- pixmapIndexed(rep(1:8, 9), nrow=6, col=terrain.colors(8))
>  plot(x)
> 
>  ## The same with different colors, and passing the function instead of
>  ## a color vector 
>  x <- pixmapIndexed(rep(1:8, 9), nrow=6, col=rainbow)
>  plot(x)
>  plot(x, asp=.5, axes=TRUE)
> 
>  ## Read data from a file
>  x <- read.pnm(system.file("pictures/logo.ppm", package="pixmap")[1])
>  plot(x)
> 
>  ## Another example that math can be beautiful
>  x <- seq(-3,3,length=100)
>  z1 <- outer(x,x,function(x,y) abs(sin(x)*sin(y)))
>  z2 <- outer(x,x,function(x,y) abs(sin(2*x)*sin(y)))
>  z3 <- outer(x,x,function(x,y) abs(sin(x)*sin(2*y)))
> 
>  ## Notice that we specify a bounding box to get the correct
>  ## coordinates on the axes. z1, z2 and z3 are used as red,
>  ## green and blue channel, respectively.
>  z <- pixmapRGB(c(z1,z2,z3), 100, 100, bbox=c(-1,-1,1,1))
>  plot(z, axes=TRUE)
> 
>  ## look at a grey version
>  plot(as(z, "pixmapGrey"))
> 
>  ## subsetting works as expected
>  plot(z[1:20,])
>  plot(z[,1:40])
>  plot(z[1:20,10:40])
> 
> 
> 
> cleanEx(); ..nameEx <- "pnm"
> 
> ### * pnm
> 
> flush(stderr()); flush(stdout())
> 
> ### Name: pnm
> ### Title: Read/Write Portable Anymap Images
> ### Aliases: write.pnm read.pnm read.pnmdata read.pnmhead
> ### Keywords: file color
> 
> ### ** Examples
> 
>  x <- read.pnm(system.file("pictures/logo.ppm", package="pixmap")[1])
>  plot(x)
>  print(x)
Pixmap image
  Type          : pixmapRGB 
  Size          : 77x101 
  Resolution    : 1x1 
  Bounding box  : 0 0 101 77 

> 
>  x <- read.pnm(system.file("pictures/logo.pgm", package="pixmap")[1])
>  plot(x)
> 
>  x <- read.pnm(system.file("pictures/logo.pbm", package="pixmap")[1])
>  plot(x)
> 
> 
> 
> ### * <FOOTER>
> ###
> cat("Time elapsed: ", proc.time() - get("ptime", env = .CheckExEnv),"\n")
Time elapsed:  2.62 0.18 2.81 0 0 
> grDevices::dev.off()
null device 
          1 
> ###
> ### Local variables: ***
> ### mode: outline-minor ***
> ### outline-regexp: "\\(> \\)?### [*]+" ***
> ### End: ***
> quit('no')