There is a StackExchange forum dedicated to Quantitative Finance.
--
David.
On 6/7/20 8:31 AM, Rob Forsyth wrote:
OK thanks for the guidance
Rob
On 7 Jun 2020, at 16:15, Bert Gunter <bgunter.4...@gmail.com> wrote:
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Such package/methodology specific questions may well go unanswered here. They
are essentially offtopic anyway: this list is about general R programming
questions and cannot be expected to support the ~ 20000 packages now in the
ecosystem. I suggest that you contact the package maintainer (?maintainer) for
help or to find out what support resources may be available.
Bert Gunter
"The trouble with having an open mind is that people keep coming along and sticking
things into it."
-- Opus (aka Berkeley Breathed in his "Bloom County" comic strip )
On Sun, Jun 7, 2020 at 3:59 AM Rob Forsyth <rob.fors...@newcastle.ac.uk> wrote:
I am using the eRm package to examine the properties of a clinical rating scale
using a Partial Credit Model (PCM). I understand how to extract the person
ability estimates (thetas) from a simple fitted PCM but I have a dataset with
repeated observations over time (~1200 observations of the instrument in ~250
individuals). So as not to violate assumptions of conditional independence I've
fitted the PCM to single observations drawn at random from each subject. This
works but I would now like to use the item diffculty estimates from the fitted
PCM to generate person-ability estimates for the remaining ~950 observations
(at other timepoints) not used to fit the model; and I can't see from the eRm
package documentation how to do this?
Advice very much appreciated
Rob
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PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
______________________________________________
R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see
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PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
