[S] simple graphing question

["Gilliam, Reid" <rgilliam@grci.com>]

Hi all,

I have a relatively simple graphing question I believe.  Suppose I have a
data frame that looks like this:

V1      V2
--------------------
abc     .11
def     .12
abc     .18
def     .24
abc     .33

where V1 is a factor variable and V2 is a double (numeric) variable.  (I am
using S-PLUS 2000 release 3 on Windows NT 4.0)

If I create a scatterplot using this data with V1 on the x-axis and V2 on
the y-axis, I get the following type of graph:

        _________________________________________       
       .4       |                                               |
        |               x                               |
       .3       |                                               |
V2      |                       x                       |
       .2       |               x                               |
        |                                               |
       .1       |               x       x                       |
        |________________________________________       |
                        abc     def
                               V1

Here, "abc" and "def" are clearly marked on the x-axis with the column name
"V1" labeled underneath the column values.

However, suppose I have this data frame instead:

V1      V2
--------------------
abc     .11
abc     .12
abc     .18
abc     .24
abc     .33

If I create a scatterplot using this data with V1 on the x-axis and V2 on
the y-axis, I now get the following:

        _________________________________________       
       .4       |                                               |
        |               x                               |
       .3       |                                               |
V2      |               x                               |
       .2       |               x                               |
        |                                               |
       .1       |               xx                              |
        |________________________________________       |
                        V1
                            
Here, "abc" is not identified on the x-axis, but the column name "V1" is
given with the tick mark.
Instead of the graph directly above, I would like to show the value of V1 at
the tick mark instead of "V1".  That is, I would like this:

        _________________________________________       
       .4       |                                               |
        |               x                               |
       .3       |                                               |
V2      |               x                               |
       .2       |               x                               |
        |                                               |
       .1       |               xx                              |
        |________________________________________       |
                        abc

Is there any way to do this?

Thanks in advance!
Reid Gilliam
GRCI Inc.
Vienna, VA
rgilliam@grci.com

 
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