[R] dotplot: labeling coordinates for each point

Qifei Zhu zhu_qifei at yahoo.com.sg
Thu May 7 03:54:53 CEST 2009

Hi Deepayan,

Thanks for the reply. here is a very simple example of what I'm looking for:

> y=c(100,0,-20)
> x=c("Atlanta", "Baltimore", "Berkeley CA")
> dotplot(y~x, xlab="Store", ylab="Revenue",main="test", scale=list(rot=60))

Basically it produces a graph of city on the x-axis and its associated revenue on the y-axis. In the real data set, the x-axis will be filled of tens or even hundreds of cities, so I wanna label the dots in the graph whenever the revenue (y value) is greater than a threshold, let's say 90 in this case. The labels should be in (x,y) format, which is (Atlanta, 100) in this case. Appreciate a lot for your help!


-----Original Message-----
From: Deepayan Sarkar [mailto:deepayan.sarkar at gmail.com] 
Sent: Wednesday, May 06, 2009 8:40 PM
To: Qifei Zhu
Cc: David Winsemius; r-help at r-project.org
Subject: Re: [R] dotplot: labeling coordinates for each point

On Tue, May 5, 2009 at 7:04 PM, Qifei Zhu <zhu_qifei at yahoo.com.sg> wrote:
> Hi Deepayan,
> Thanks for the hint. I spent some time on the research but haven't got any luck in writing the custom panel function for the conditional labeling of points in a graph. Could you please provide some more thoughts and probably some pseudo code? Thank you so much for your time!

I'll be happy to try if you provide a reproducible example.


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