Hi Gabor,
This is not for a regression function but for a major update I'm working on
for the summary.formula function in the Hmisc package. So I need to handle
several data types in the formula.
Thanks
Frank
Gabor Grothendieck wrote
>> Gabor Grothendieck wrote
>>> On Fri, Mar 1, 2013 at 7:16 P
Achim this is perfect. I had not seen Formula before. Thanks for writing
it!
Frank
Achim Zeileis-4 wrote
> On Fri, 1 Mar 2013, Frank Harrell wrote:
>
>> Thank you Bill. A temporary re-arrangement of the formula will allow me
>> to
>> do the usual subset= na.action= processing afterwards. Nice
On Fri, 1 Mar 2013, Frank Harrell wrote:
Thank you Bill. A temporary re-arrangement of the formula will allow me to
do the usual subset= na.action= processing afterwards. Nice idea. I don't
need the dot notation very often for this application.
That's what the "Formula" package provides. It
> Gabor Grothendieck wrote
>> On Fri, Mar 1, 2013 at 7:16 PM, Frank Harrell <
>
>> f.harrell@
>
>> > wrote:
>>> The lattice package uses special logic to allow for multiple
>>> left-hand-side
>>> variables in a formula, e.g. y1 + y2 ~ x. Is there an elegant way to do
>>> this outside of lattice?
Thank you Bill. A temporary re-arrangement of the formula will allow me to
do the usual subset= na.action= processing afterwards. Nice idea. I don't
need the dot notation very often for this application.
Frank
William Dunlap wrote
> I don't know how much of the information that model.frame supp
Thanks for your reply Gabor. That doesn't handle a mixture of factor and
numeric variables on the left hand side.
Frank
Gabor Grothendieck wrote
> On Fri, Mar 1, 2013 at 7:16 PM, Frank Harrell <
> f.harrell@
> > wrote:
>> The lattice package uses special logic to allow for multiple
>> left-hand
I don't know how much of the information that model.frame supplies you need,
but you could make a data.frame containing all the variables on both sides of
them
formula by changing lhs~rhs into ~lhs+rsh before calling model.frame. E.g.,
f <- function (formula) {
if (length(formula) == 3) { #
On Fri, Mar 1, 2013 at 7:16 PM, Frank Harrell wrote:
> The lattice package uses special logic to allow for multiple left-hand-side
> variables in a formula, e.g. y1 + y2 ~ x. Is there an elegant way to do
> this outside of lattice? I'm trying to implement a data summarization
> function that log
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