Issue with formula conversion
Thanks for the help! However, I just need to get pdCompSymm(~1 + Age) without a tilde (~) at the beginning.
On Wed, Aug 27, 2014 at 3:34 PM, David Winsemius <dwinsemius at comcast.net> wrote:
On Aug 27, 2014, at 11:19 AM, Gang Chen wrote:
A random effect formulation for R package nlme is read in as a string of characters from an input file: ranEff <- "pdCompSymm(~1+Age)" I need to convert 'ranEff' to a formula class. However, as shown below:
as.formula(ranEff)
~1 + Age the "pdCompSymm" is lost in the conversion. Any solutions?
as.formula(paste("~",ranEff))
~pdCompSymm(~1 + Age)
--
David Winsemius
Alameda, CA, USA