[R] Multiple graphs

[Jim Lemon]

On 03/14/2011 06:22 PM, Akshata Rao wrote:
> ...
> However, there is only one small problem with the graphs. The graph doesn't
> give me the asset names. I.e. in the graph which is meant for bank doesn't
> show me the name bank. Under the X - label i.e. Rating, it gives me number
> 1, Similarly for corporate and sovereign it gives the numbers 2 and 3
> respectively.
>
Hi Akshata,
Try this:

DP_graphs <- function(Data = output, class.var="basel_asset_class_id",
  class.labels=NULL,ratings="internal_scale_id",
  IPD="default_probability") {
    class <- unique(as.character(Data[[class.var]]))[1]
    png(filename=sprintf("%s%s%s%s%s", "Curve ",
     "( ", class," )",".png"),width=480,height=480)
    par('bg'= "#FFFFCC")
    par(xaxt="n")
    # if the labels are not specified, default to the numbers
    if(is.null(class.labels)) class.labels<-unique(class)
    # stick your labels together here
    class.labels<-paste("(",class.labels,")",sep="")
    plot(as.numeric(factor(Data[[ratings]])), Data[[IPD]],
    "b",ylab="PD", xlab="Rating",
         fg="#804000", font.main=2,cex.main=1,col="Red",
         col.main="black",col.axis="black" ,col.lab = "black")
    # replace the class numbers with the appropriate labels
    title("Exponential Curve", sub=class.labels[as.numeric(class)],
     cex.main=1.2,font.main= 2, col.main= "black", cex.sub = 1,
     font.sub = 2, col.sub ="black")
    par(xaxt="s")
    axis(1,at=1:length(unique(output$internal_scale_id)), labels =
internal_scale)
    box(which="outer",bty = "o", col = "#804000")
    dev.off()
}

d_ply(output, .(basel_asset_class_id), DP_graphs,
  class.labels=c("bank","corporate","sovreign"))

Jim