[R] Graph to show that very few classes has maximum best performers

[Jim Lemon]

On 11/05/2009 03:40 AM, Sunita22 wrote:
> Hello
>
> I need help for the following:
>
> my data is
> class no. best performers
> 101      10
> 102      21
> 103       1
> 104       3
> 105       5
> 106    190
> ...    ...
> ...    ...
> ...    ...
> ...    ...
>
> I want to plot a graph using R, to show that very few classes has maximum
> best performers. can someone guide me for this? I tried using cumulative
> frequencies and then plotting a graph but it does not serve the purpose.
>    
Hi Sunita,
Maybe this will do what you want:

sundat
   class_no best_performers
1      101              10
2      102              21
3      103               1
4      104               3
5      105               5
6      106             190

library(plotrix)
staircase.plot(sundat$best_performers,
  labels=paste("Class",sundat$class_no),
  inc.col="blue",direction="s",
  totals=c(TRUE,rep(FALSE,dim(sundat)[1]-1)),
  main="Best performers by class")

Jim