Date: Fri, 19 May 2006 10:40:42 -0400
Reply-To: "Feinstein, Zachary" <ZFeinstein@HarrisInteractive.com>
Sender: "SPSSX(r) Discussion" <SPSSX-L@LISTSERV.UGA.EDU>
From: "Feinstein, Zachary" <ZFeinstein@HarrisInteractive.com>
Subject: Re: How Can I Create a Scatterplot With Group Averages/Centroids
Plotted and Labeled Within It? - Two Followups
Content-Type: text/plain; charset="us-ascii"
Thanks much. It worked. I also need to really check out the
functionality of all the graphing capabilities in SPSS now too.
Zachary
-----Original Message-----
From: SPSSX(r) Discussion [mailto:SPSSX-L@LISTSERV.UGA.EDU] On Behalf Of
Beadle, ViAnn
Sent: Thursday, May 18, 2006 8:42 PM
To: SPSSX-L@LISTSERV.UGA.EDU
Subject: Re: How Can I Create a Scatterplot With Group
Averages/Centroids Plotted and Labeled Within It? - Two Followups
the color differentiation comes from color(jobcat) as a function in this
example. Try swapping the two color functions in the two elements, you
should get all your points as blue and centroids with varying colors by
region.
________________________________
From: SPSSX(r) Discussion on behalf of Feinstein, Zachary
Sent: Thu 5/18/2006 6:04 PM
To: SPSSX-L@LISTSERV.UGA.EDU
Subject: Re: How Can I Create a Scatterplot With Group
Averages/Centroids Plotted and Labeled Within It? - Two Followups
That is some wonderful code. Thank you very much.
I do have two questions though. First, how did the code know to give a
different color to each of the brand points? Second, would it be
possible to revise the code in such a way so that the scatter of all the
points comes out in a single standard color but the centroids each have
different colors instead of the other way around?
Thank you.
Zachary
-----Original Message-----
From: Peck, Jon [mailto:peck@spss.com]
Sent: Monday, May 15, 2006 7:17 AM
To: Feinstein, Zachary; SPSSX-L@LISTSERV.UGA.EDU
Subject: RE: [SPSSX-L] How Can I Create a Scatterplot With Group
Averages/Centroids Plotted and Labeled Within It?
There was a suggestion posted to use Igraph for this. If you want to
use the standard graphics, you can do something like the code below,
which is an example using the employee data.sav file shipped with SPSS.
While there is more code in this example than you might expect, it
illustrates the flexibility of GPL-based graphics. You can combine
different graph elements in very flexible ways. This example combines a
grouped scatterplot of salary and salbegin by jobcat with another
scatterplot where the means have been calculated for each group and
passed to the charting engine. That is, it has blended two different
scatterplots that have compatible domains in one chart. I could have
used any aggregation statistics in the same fashion.
If you are coming to our Directions conference in Barcelona, you can see
me do this live and in color on Sunday in a preconference training class
:-)
Regards,
Jon Peck
* chart 11: A Simple Scatterplot with overlaid centroids.
* Uses two datasets.
get file="c:/spss14/employee data.sav".
GGRAPH
/GRAPHDATASET NAME="graphdataset" VARIABLES=salbegin salary jobcat
/GRAPHDATASET NAME="graphdataset2" VARIABLES=jobcat
mean(salbegin)[rename="mean_salbegin"]
mean(salary)[rename="mean_salary"]
/GRAPHSPEC SOURCE=INLINE.
BEGIN GPL
SOURCE: s=userSource(id("graphdataset"))
DATA: salbegin=col(source(s), name("salbegin"))
DATA: salary=col(source(s), name("salary"))
DATA: jobcat=col(source(s), name("jobcat"),unit.category())
DATA: jobcatt=col(source(t), name("jobcat"),unit.category())
SOURCE: t=userSource(id("graphdataset2"))
DATA: mean_salbegin=col(source(t), name("mean_salbegin"))
DATA: mean_salary=col(source(t), name("mean_salary"))
GUIDE: axis(dim(1), label("Beginning Salary"))
GUIDE: axis(dim(2), label("Current Salary"))
ELEMENT: point(position(salbegin*salary), color(jobcat))
ELEMENT: point(position(mean_salbegin*mean_salary),size(size."12px"),
color(color.blue))
END GPL.
-----Original Message-----
From: SPSSX(r) Discussion [mailto:SPSSX-L@LISTSERV.UGA.EDU] On Behalf Of
Feinstein, Zachary
Sent: Freitag, 12. Mai 2006 15:20
To: SPSSX-L@LISTSERV.UGA.EDU
Subject: [SPSSX-L] How Can I Create a Scatterplot With Group
Averages/Centroids Plotted and Labeled Within It?
I am using V14. I can easily do a scatterplot. I can also easily
create a table of the groups I am interested in to get averages. Let's
use regions (four of them) as an example- East, West, North, South.
I can do a table of var1 + var2 BY region then export the results to
Excel and plot the points. This only does the averages though.
I'm interested in seeing the scatter of all the individual respondents,
but then the averages/centroids plotted in there too (perhaps in a
larger/more colorful symbol), and have the averages/centroids for each
of the four regions labeled.
Can this easily be done with SPSS? Note that I use syntax.
Thank you in advance.
Zachary
zfeinstein@harrisinteractive.com
(763) 541-7161
