Barplot with Secondary axis
Using par(new=TRUE) will often cause more problems than it helps. A better approach would be to use the twoord.plot function from the plotrix package or to use the updateusr function from the TeachingDemos package along with the lines function to add the lines afterwards.
On Wed, Aug 22, 2012 at 7:43 AM, vikrant <vikrant.shimpi at tcs.com> wrote:
Hi all,
I am trying to plot a bar chart and trying to plot a line as a secondary
axis as my scale is different for two y axis.
I am plotting a clustered bar chart by using besides = True option in
barplot function and my y coordinates are not plotted exactly at the center
on each two bars. Please help me.
I am pasting the code as follows.
x = c("a","b","c","d")
y= cbind(c(50,40,30,20),c(40,30,20,10))
y2 = c(0.80,0.65,0.75,0.50)
barplot(t(y),beside = TRUE)
par(new=T)
plot(y2,,,type="o",col="black",lwd=
3,lty=1,xaxt="n",yaxt="n",xlab="",ylab="")
points(y2,pch=20)
I also tried following code for plotting the line point exactly at the
center of two bars:
x = c("a","b","c","d")
y= cbind(c(50,40,30,20),c(40,30,20,10))
y2 = c(0.80,0.65,0.75,0.50)
barplot(t(y),beside = TRUE)
a = barplot(t(y),beside = TRUE)
par(new=T)
plot(colMeans(a),y2,type="l",col="black",lwd=
1,lty=1,xaxt="n",yaxt="n",xlab="",ylab="")
points(colMeans(a),y2,pch=20)
Please help me in plotting this graph
--
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