|
|
Spline is one useful option, but discretizing
and looking at the transformation plot would give insight into the point(s)
at which things change.
Jon Peck
SPSS, an IBM Company
[hidden email]
312-651-3435
| From:
| Bruce Weaver <[hidden email]>
|
| To:
| [hidden email]
|
| Date:
| 09/22/2010 09:36 AM
|
| Subject:
| Re: [SPSSX-L] Using a segmented linear
regression to find a transition
point
|
| Sent by:
| "SPSSX(r) Discussion" <[hidden email]> |
Jon K Peck wrote:
>
> Take a look at the CATREG command. You can tell it to discretize
a
> predictor into a specified number of groups according to various criteria,
> and it will find the optimal placement for the segments.
>
> HTH,
> Jon Peck
> SPSS, an IBM Company
> [hidden email]
> 312-651-3435
>
Hi Jon. I don't have access to CATREG, but I have taken a look at
the
tutorial in the Help. I may be misunderstanding, but I don't think
discretization is what the OP is after here. It would be one of the
various
spline options, wouldn't it?
Thanks,
Bruce
-----
--
Bruce Weaver
[hidden email]
http://sites.google.com/a/lakeheadu.ca/bweaver/
"When all else fails, RTFM."
NOTE: My Hotmail account is not monitored regularly.
To send me an e-mail, please use the address shown above.
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