[R] Is there way to multiple plots on gap.plot?

[Jim Lemon]

On Mon, 2008-07-28 at 12:15 -0700, Arthur Roberts wrote:
> Hi, all,
> 
> Does anyone now of a way to put multiple plots on gap.plot?
> 
> Much appreciated,

Hi Art,
You must have read my mind. In solving the problem you had with
gap.plot, I considered including an "add" argument that would allow the
user to add values to an existing plot. The bad news is that I decided
against it. As the examples show, you can plot several series of data
simultaneously with not very much trouble. However, if you can convince
me that "add" is a good idea, I might do it. Right now, though, I would
appreciate your testing of the new gap.plot function below.

Jim

gap.plot<-function(x,y,gap,gap.axis="y",bgcol="white",breakcol="black",
 brw=0.02,xlim,ylim,xticlab,xtics=NA,yticlab,ytics=NA,lty=rep(1,length(x)),
 col=rep(par("col"),length(x)),pch=rep(1,length(x)),...) {

 if(missing(y) && !missing(x)) {
  y<-x
  x<-1:length(y)
 }
 if(missing(gap)) stop("gap must be specified")
 gapsize<-diff(gap)
 figxy <- par("usr")
 xaxl<-par("xlog")
 yaxl<-par("ylog")
 xgw<-(figxy[2]-figxy[1])*brw
 ygw<-(figxy[4]-figxy[3])*brw
 if(missing(xtics)) xtics<-pretty(x)
 if(missing(ytics)) ytics<-pretty(y)
 if(missing(xticlab)) xticlab<-xtics
 if(missing(yticlab)) yticlab<-ytics
 if(length(col) < length(y)) col<-rep(col,length.out=length(y))
 if(gap.axis == "y") {
  littleones<-which(y < gap[1])
  if(length(gapsize) > 2) {
   middleones<-which(y >= gap[2] & y < gap[3])
   bigones<-which(y >= gap[4])
   lostones<-sum(c(y > gap[1] & y < gap[2], y > gap[3] & y < gap[4]))
   if(missing(ylim)) ylim<-c(min(y),ygw*2
+max(y)-(gapsize[1]+gapsize[3]))
   else ylim[2]<-ygw*2+ylim[2]-(gapsize[1]+gapsize[3])
  }
  else {
   middleones<-NA
   bigones<-which(y >= gap[2])
   lostones<-sum(y > gap[1] & y < gap[2])
   if(missing(ylim)) ylim<-c(min(y),max(y)-gapsize[1])
   else ylim[2]<-ygw+ylim[2]-gapsize[1]
  }
  if(lostones) warning("some values of y will not be displayed")
  if(missing(xlim)) xlim<-range(x)
 }
 else {
  littleones<-which(x < gap[1])
  if(length(gapsize) > 2) {
   middleones<-which(x >= gap[2] & x < gap[3])
   bigones<-which(x >= gap[4])
   lostones<-sum(c(x > gap[1] & x < gap[2], x > gap[3] & x < gap[4]))
   if(missing(xlim)) xlim<-c(min(x),xgw*2
+max(x)-(gapsize[1]+gapsize[3]))
   else xlim[2]<-xgw*2+xlim[2]-(gapsize[1]+gapsize[3])
  }
  else {
   middleones<-NA
   bigones<-which(x >= gap[2])
   lostones<-sum(x > gap[1] & x < gap[2])
   if(missing(xlim)) xlim<-c(min(x),max(x)-gapsize[1])
   else xlim[2]<-xgw+xlim[2]-gapsize[1]
  }
  if(lostones) warning("some values of x will not be displayed")
  if(missing(ylim)) ylim<-range(y)
 }
 if(length(lty) < length(x)) lty<-rep(lty,length.out=length(x))
 if(length(col) < length(x)) col<-rep(col,length.out=length(x))
 if(length(pch) < length(x)) pch<-rep(pch,length.out=length(x))
 plot(x[littleones],y[littleones],xlim=xlim,ylim=ylim,axes=FALSE,
  lty=lty[littleones],col=col[littleones],pch=pch[littleones],...)
 box()
 if(gap.axis == "y") {
  if(!is.na(xtics[1])) axis(1,at=xtics,labels=xticlab)
  littletics<-which(ytics < gap[1])
  if(length(gapsize) > 2) {
   middletics<-which(ytics >= gap[2] & ytics <= gap[3])
   bigtics<-which(ytics >= gap[4])
   show.at<-c(ytics[littletics],ytics[middletics]-gapsize[1],],...)
    ytics[bigtics]-(gapsize[1]+gapsize[3]))
   show.labels<-c(yticlab[littletics],yticlab[middletics],yticlab
   [bigtics])),
  }
  else {
   bigtics<-which(ytics >= gap[2])
   show.at<-c(ytics[littletics],ytics[bigtics]-gapsize[1])
   show.labels<-c(ytics[littletics],yticlab[bigtics])
  }
  axis(2,at=show.at,labels=show.labels)
  axis.break(2,gap
  [1]-ygw,style="gap",bgcol=bgcol,breakcol=breakcol,brw=brw)
  if(length(gapsize) > 2) {
   axis.break(2,gap[3]-(gapsize[1]+ygw),style="gap",bgcol=bgcol,
    breakcol=breakcol,brw=brw)
   points(x[middleones],y[middleones]-gapsize[1],
    lty=lty[middleones],col=col[middleones],pch=pch[middleones],...)
   points(x[bigones],y[bigones]-(gapsize[1]+gapsize[3]),
    lty=lty[bigones],col=col[bigones],pch=pch[bigones],...)
  }
  else points(x[bigones],y[bigones]-gapsize[1],
   lty=lty[bigones],col=col[bigones],pch=pch[bigones],...)
 }
 else {
  if(!is.na(ytics[1])) axis(2,at=ytics,labels=yticlab)
  littletics<-which(xtics<gap[1])
  if(length(gapsize) > 2) {
   middletics<-which(xtics >= gap[2] & xtics <= gap[3])
   bigtics<-which(xtics >= gap[4])
   show.at<-c(xtics[littletics],xtics[middletics]-gapsize[1],],...)
    xtics[bigtics]-(gapsize[1]+gapsize[3]))

show.labels<-c(xticlab[littletics],xticlab[middletics],xticlab[bigtics])
  }
  else {
   bigtics<-which(xtics >= gap[2])
   show.at<-c(xtics[littletics],xtics[bigtics]-gapsize[1])
   show.labels<-c(xticlab[littletics],xticlab[bigtics])
  }
  axis(1,at=show.at,labels=show.labels)
  axis.break(1,gap[1]-xgw,style="gap")
  if(length(gapsize) > 2) {
   axis.break(1,gap[3]-(gapsize[1]+xgw),style="gap")
   points(xgw+x[middleones]-gapsize[1],y[middleones],])
    lty=lty[middleones],col=col[middleones],pch=pch[middleones],...)
   points(x[bigones]-(gapsize[1]+gapsize[3]),y[bigones],
    lty=lty[bigones],col=col[bigones],pch=pch[bigones],...)
  }
  else points(x[bigones]-gapsize[1],y[bigones],
   lty=lty[bigones],col=col[bigones],pch=pch[bigones],...)
 }
}