From: Don Armstrong <don@donarmstrong.com>
Date: Mon, 1 Aug 2016 22:44:18 +0000 (-0500)
Subject: return invisible
X-Git-Url: https://git.donarmstrong.com/?a=commitdiff_plain;h=b17c0e2672a535c89bac925f0dbebdcb30261333;p=r%2FCairoHacks.git

return invisible
---

diff --git a/R/raster_plots.R b/R/raster_plots.R
index 87c19cc..63ed43a 100644
--- a/R/raster_plots.R
+++ b/R/raster_plots.R
@@ -15,7 +15,7 @@
 ##' ### plot a raster plot in a PDF
 ##' pdf()
 ##' start_rasterplot()
-##' print(xyplot(y~x,
+##' print(plot(y~x,
 ##'      data=data.frame(y=rnorm(1E8),x=rnorm(1E8))))
 ##' stop_rasterplot()
 ##' dev.off()
@@ -51,7 +51,7 @@ start_rasterplot <- function(width=NULL,height=NULL) {
     }
         
     Cairo::Cairo(width=width,height=height,dpi=width/width.points*dpi,file="/dev/null")
-    NULL
+    invisible()
 }
 ##' Stops a raster plot and returns the results and optionally plots them
 ##'