r function access local string variable

Question

I'm trying to write a function to print out a pdf of some graph. I would like my function to take 2 arguments (options): the dataset which I will draw my graphs from and a string variable which is used for the pdf file name. How do I pass the string to a command within the function? my code is :

 plot_all_layout <- function(network, filename){
    layouts <- grep("^layout_", ls("package:igraph"), value=TRUE)[-1] 
      # Remove layouts that do not apply to our graph.
      layouts <- layouts[!grepl("bipartite|merge|norm|sugiyama|tree", layouts)]

      par(mfrow=c(3,3), mar=c(1,1,1,1))
      pdf("filename.pdf") #here is where I would like to call the local var

      for (layout in layouts) {
        print(layout)
        l <- do.call(layout, list(network)) 
        plot(network, edge.arrow.mode=0, layout=l, main=layout) }
      dev.off()
      par(mfrow=c(1,1)
  }

Is "filename.pdf" the string for a variable in R or the name of a pdf-file in some directory? — Cactus
– Cactus, Commented Dec 14, 2017 at 7:32

Cactus · Accepted Answer · 2017-12-14 07:35:26Z

1

I think you should use pdf(paste0(filename, ".pdf"))

Hope this helps.

answered Dec 14, 2017 at 7:35

Cactus

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