[R] Regarding R doubt on rasch model

[Rui Barradas]

Hello,

There are many packages that implement rasch models but I could only 
find 2 with summary methods,

package pairwise and
package ltm

See [1] and [2].


To see the source code at an R prompt
print the function code with

summary.<the_object_class>

where <the_object_class> is the output of

class(PL2.rasch)


R is open source and the code is available to download from CRAN.


Hope this helps,

Rui Barradas

Às 07:48 de 19/06/19, shreepad khandve escreveu:
> 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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