I was probably too vague. I meant that the group variable descirbes
the group (eg. different individuals) and val1 and val2 are just two
variables measured from eg. individual.
> mydata
val1 val2 group
1 1.1 4.2 0
2 3.2 5.3 1
3 4.1 3.4 0
4 2.5 2.6 1
5 6.2 5.3 0
6 5.3 6.2 1
7 4.5 7.7 0
8 2.2 4.8 1
9 4.7 3.4 0
10 2.7 2.1 1
So, I want to color the points of those groups using different colour.
- J
2009/12/1 David Winsemius <dwinsem...@comcast.net>:
>
> On Dec 1, 2009, at 12:42 AM, johannes rara wrote:
>
>> Hi,
>>
>> Is there a way to get different colour based on group when plotting
>> stripchart?
>>
>> mydata <- data.frame(val1 = c(1.1, 3.2, 4.1, 2.5, 6.2, 5.3, 4.5, 2.2,
>> 4.7, 2.7), val2 = c(4.2, 5.3, 3.4, 2.6, 5.3, 6.2, 7.7, 4.8, 3.4, 2.1),
>> group = rep(0:1, 5))
>> mydata.stack <- stack(mydata, select=-group)
>>
>> stripchart(values ~ ind,
>> data=mydata.stack,
>> vertical=T,
>> at=c(1.25, 1.75),
>> pch=15,
>> col="red")
>>
>> I would like to get different colour for the two groups (based on
>> group variable). I tried something like
>>
>> stripchart(values ~ ind,
>> data=mydata.stack,
>> vertical=T,
>> at=c(1.25, 1.75),
>> pch=15,
>> col=c("red", "yeallow")[mydata$group])
>
> Doesn't this work?
>
> stripchart(values ~ ind,
> data=mydata.stack,
> vertical=T,
> at=c(1.25, 1.75),
> pch=15,
> col=c("red", "yellow") )
>
> I would not think that mydata$group would be "in sync" with the dataset that
> you are passing to stripchart.
>
> --
> David
>
> David Winsemius, MD
> Heritage Laboratories
> West Hartford, CT
>
>
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