[GenABEL-dev] ld-based pruning

[Yurii Aulchenko]

> Technically, if we make it part of GenABEL would that mean that GenABEL
> depends on DatABEL (now it is only a suggested dependency) since Paul's
> function 'require()'s DatABEL? Are there any other R packages that have
> functionality that only works if a given package is installed (that is
> not in the dependency list but only in the suggested list)?
>
>

I do not see a big problem with above - e.g. there are functions like
minimac2databel in the GenA. They start with (
https://r-forge.r-project.org/scm/viewvc.php/pkg/GenABEL/R/minimac2databel.R?view=markup&root=genabel
)

minimac2databel <- function(imputedgenofile, infofile, outfile, cachesizeMb=64)
{
  if (!require(DatABEL))
    stop("This function requires DatABEL package to be installed")


This seems to be accepted practice

Yurii
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