[R-sig-ME] keep.data in lme

[Douglas Bates]

The nlme package predated lme4 by several years and features of lme4 were
never backported to nlme.

On Fri, Jul 1, 2022 at 4:04 AM Cole, Tim <tim.cole using ucl.ac.uk> wrote:

> I note that lme has an argument keep.data which saves a copy of data (if
> it’s a data frame) to the lme object, whereas nlme lacks this argument. I’m
> curious - does anyone (BB?) know why they are different?
>
> > args(lme)
> function (fixed, data = sys.frame(sys.parent()), random, correlation =
> NULL,
>     weights = NULL, subset, method = c("REML", "ML"), na.action = na.fail,
>     control = list(), contrasts = NULL, keep.data = TRUE)
> NULL
> > args(nlme)
> function (model, data = sys.frame(sys.parent()), fixed, random = fixed,
>     groups, start, correlation = NULL, weights = NULL, subset,
>     method = c("ML", "REML"), na.action = na.fail, naPattern,
>     control = list(), verbose = FALSE)
> NULL
>
> Best wishes,
> Tim Cole
>
> Population Policy and Practice
> UCL Great Ormond Street Institute of Child Health
> 30 Guilford Street, London WC1N 1EH
>
>
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>
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