Data too long - Why?

General
1

I have an error message which I don't understand:

Error in matrix(1, nrow = sum(groups$groupfirst)) : data is too long

It appears when using raschmix():

nicetry_mix1 <- raschmix(Eleven ~ Sksum, data = nicetry, k = 1:4,scores = "meanvar")

That's the structure of my data

> str(nicetry)
'data.frame':	99 obs. of  3 variables:
 $ Gender: Factor w/ 3 levels "w","m","x": 1 1 2 1 2 2 1 2 2 1 ...
 $ Sksum : int  23 28 26 38 30 21 29 39 32 29 ...
 $ Eleven: num [1:99, 1:11] 3 2 5 4 1 1 3 1 4 3 ...
  ..- attr(*, "dimnames")=List of 2
  .. ..$ : NULL
  .. ..$ : chr [1:11] "Item011" "Item021" "Item031" "Item041" ...

Does anyone have an idea what the error message means? I am so lost!

Thank you very much for any suggestions!

2

Did you write the function raschmix yourself or is it part of a package?
If it is part of a package then (tell us and) check if your input satisfies the documentation of the function.

When asking this type of questions it is most helpful to produce a example that the reader can execute. Search in this group for the word reprex or reproducible example.

3

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