Re: Color code Scatter Plot.......

[Sundar Dorai-Raj <sundar.dorai-raj@pdf.com>]

Khan, Sohail wrote:
> Dear S-plus users,
> I have a data frame something like:
> Chr    X        Y
> 1       10       5
> 1        8.5     12
> 1         6       3
> 2         15      22
> 2         25      10
> 2         9         5
> 3         10       12
> 3         29       41
>
>
> I want to create a scatter plot of X,Y, "color coded" based on the column Chr.  
> I.E. chr1=red,chr2=green, chr3=yellow, so on.......
> Can this be done in S-PLUS??  I would appreciate your help.
> Thanks.
Very easily in trellis.

xyplot(Y ~ X, data = my.data, groups = Chr)

where "my.data" is your data.frame containing "X", "Y", and "Chr".

I'll let others give you direction using traditional graphics (i.e. 
?plot, ?points, etc.)
--sundar