[Rd] bug report: inaccurate error message for stats::chisq.test

[Rui Barradas]

Hello,

A workaround could be

y <- addNA(y)
chisq.test(x,y)


But this implies that the user was aware of the  reason why the error.

Hope this helps,

Rui Barradas

On 21/08/2018 15:31, Ant F wrote:
> Hi,
> 
> `stats::chisq.test` checks that x and y each have at least 2 levels AFTER
> filtering on complete cases.
> 
> It makes sense but the error message is misleading : “'x' and 'y' must have
> at least 2 levels”
> 
> Here’s how to reproduce the issue :
> 
>      x <- structure(c(1L, 1L, 1L, 2L, 1L, 2L), .Label = c("0001", "0003"),
> class = "factor")
> 
>      y <- structure(c(1L, 2L, 2L, NA, 2L, NA), .Label = c("0001", "0002"),
> class = "factor")
> 
>      chisq.test(x,y)
> 
>      # Error in chisq.test(...) : 'x' and 'y' must have at least 2 levels
> 
> In this case they do have 2 levels.
> 
> Best regards,
> 
> Antoine
> 
>>
> 
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> 
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