[R] Regarding R doubt

Eric Berger er|cjberger @end|ng |rom gm@||@com
Wed Jun 19 14:34:46 CEST 2019

Hi Shreepad,
>From the command 'summary(PL2.rasch)' it seems that PL2.rasch is an object.
You don't provide enough details on how this object was created.
What python or R packages? And what functions from those packages were used?
Ideally you would provide a reproducible example, but even without that at
least the statements that were used (including the packages).
Finally you should try to submit your question in plain text (and not in


On Wed, Jun 19, 2019 at 3:25 PM shraak using outlook.com <shraak using outlook.com>

> Hello Team,
> I hope you are doing well.
> I have one doubt about backend functioning of R command.
> Currently I'm working on IRT analysis in python but this function is
> implemented in R and in R they have direct rasch model library but no such
> library in the Python.
> So I wanted to know that is there any way to find the math or formula
> behind the specific command of R language.
> for eg, summary(PL2.rasch)
> after this command you will directly get difficulty and discrimination
> values like mentioned below:
> Coefficients:
>                  value           std.err   z.vals
> Dffclt.V1    3.1135       9.8208  0.3170
> Dffclt.V2   -0.5157       0.8941 -0.5768
> Dffclt.V3   -1.3585       3.2062 -0.4237
> Dffclt.V4   -1.0032    8649.3103 -0.0001
> Dffclt.V5    0.0400    1350.8452  0.0000
> So is there any way to find out the math behind this summary command ?
> Thanks,
> Shreepad
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