R Under development (unstable) (2015-03-11 r67980) -- "Unsuffered Consequences"
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[Previously saved workspace restored]

> 
> library(knitr)
> 
> knit("gridgraphics.Rhtml")


processing file: gridgraphics.Rhtml

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Loading required package: grid
Loading required package: graph
Loading required package: Rgraphviz

Attaching package: 'gridSVG'

The following object is masked from 'package:grDevices':

    dev.off


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output file: gridgraphics.html

[1] "gridgraphics.html"
Warning messages:
1: In grid.export("gridGraphics.svg", prefix = "gridGraphics") :
  Not all element IDs are unique. Consider running 'grid.export' with 'uniqueNames = TRUE'.
2: In grid.export("gridSVG.svg", prefix = "gridSVG") :
  Not all element IDs are unique. Consider running 'grid.export' with 'uniqueNames = TRUE'.
3: In grid.export("accessible.svg", prefix = "accessible") :
  Not all element IDs are unique. Consider running 'grid.export' with 'uniqueNames = TRUE'.
> 
> # A little post-processing
> html <- readLines("gridgraphics.html")
> writeLines(gsub("plot.new has not been called yet",
+                 "\n  plot.new has not been called yet",
+                 html),
+            "gridgraphics.html")
> 
> 
> 
> proc.time()
   user  system elapsed 
 51.803   0.124  52.790