[R] dotplot: labeling coordinates for each point

[Deepayan Sarkar]

On Thu, May 7, 2009 at 7:42 AM, Qifei Zhu <zhu_qifei at yahoo.com.sg> wrote:
> Hi Deepayan,
>
>
>
> I guess I’m quite confusing when asking the question. I was actually looking
> for labels beside the dot in the graph (shown below), rather than the labels
> on the x-axis. Is that possible? Thanks a lot!

In that case

dotplot(y ~ x, xlab="Store", ylab="Revenue", main="test",
        scales=list(x = list(draw = FALSE)),
        panel = function(x, y, ...) {
            panel.dotplot(x, y, ...)
            id <- y > 90
            panel.text(as.numeric(x[id]), y[id],
                       labels = sprintf("(%s,%g)", as.character(x[id]), y[id]),
                       pos = 4)
        })

-Deepayan



>
>
>
> Best,
>
> Tony
>
>
>
>
>
> -----Original Message-----
> From: r-help-bounces at r-project.org [mailto:r-help-bounces at r-project.org] On
> Behalf Of Deepayan Sarkar
> Sent: Thursday, May 07, 2009 1:44 AM
> To: Qifei Zhu
> Cc: r-help at r-project.org
> Subject: Re: [R] dotplot: labeling coordinates for each point
>
>
>
> On Wed, May 6, 2009 at 6:54 PM, Qifei Zhu <zhu_qifei at yahoo.com.sg> wrote:
>
>> 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!
>
>
>
> dotplot(y~x, xlab="Store", ylab="Revenue",main="test",
>
>         xlim = ifelse(y > 90, sprintf("(%s,%g)", x, y), ""),
>
>         scales=list(rot=60))
>
>
>
> -Deepayan
>
>
>
>
>
>>
>
>> Best,
>
>> Tony
>
>>
>
>> -----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.
>
>>
>
>> -Deepayan
>
>>
>
>>
>
>
>
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