Some functions not exported?

[thoree]

The below documented functions appear not to be available

library(pedtools)
as.data.frame.ped
#> Error in eval(expr, envir, enclos): object 'as.data.frame.ped' not found
as.matrix.ped
#> Error in eval(expr, envir, enclos): object 'as.matrix.ped' not found
as.ped.data.frame
#> Error in eval(expr, envir, enclos): object 'as.ped.data.frame' not found
as.matrix.ped
#> Error in eval(expr, envir, enclos): object 'as.matrix.ped' not found

^{Created on 2019-04-24 by the reprex package (v0.2.1)}

[magnusdv]

These are methods for S3 generics, which behave somewhat differently than other functions. For example, as.data.frame() is a generic function in base R, for which many different methods have been written:

library(pedtools)
methods(as.data.frame)
#>  [1] as.data.frame.aovproj*        as.data.frame.array          
#>  [3] as.data.frame.AsIs            as.data.frame.character      
#>  [5] as.data.frame.complex         as.data.frame.data.frame     
#>  [7] as.data.frame.Date            as.data.frame.default        
#>  [9] as.data.frame.difftime        as.data.frame.factor         
#> [11] as.data.frame.ftable*         as.data.frame.integer        
#> [13] as.data.frame.list            as.data.frame.logical        
#> [15] as.data.frame.logLik*         as.data.frame.matrix         
#> [17] as.data.frame.model.matrix    as.data.frame.noquote        
#> [19] as.data.frame.numeric         as.data.frame.numeric_version
#> [21] as.data.frame.ordered         as.data.frame.ped*           
#> [23] as.data.frame.POSIXct         as.data.frame.POSIXlt        
#> [25] as.data.frame.raw             as.data.frame.table          
#> [27] as.data.frame.ts              as.data.frame.vector         
#> see '?methods' for accessing help and source code

When called, as.data.frame() looks at the class of the first argument, and forwards (dispatches) to the appropriate method. pedtools provides a method for ped objects, that's why as.data.frame.ped() is included in the above list (if we hadn't loaded pedtools first, it wouldn't be included).

The documentation for these functions are as usual, invoked e.g. by ?as.data.frame.ped.

To see the code, you can use for example

getS3method("as.data.frame", class = "ped")

or

getAnywhere("as.data.frame.ped")