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?
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
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 dwinsem...@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
On Aug 27, 2014, at 12:44 PM, Gang Chen wrote:
Thanks for the help! However, I just need to get
pdCompSymm(~1 + Age)
That's not a formula in the R sense of the word. You should do a better job of
posting a use case. Perhaps you want an expression?
--
David.
without a tilde (~) at the
Good point!
Here is an example:
library(nlme)
fm - lme(yield ~ nitro, data=Oats, random=list(Block=pdComSymm(~Variety-1)))
Now the problem I'm facing is that the following part
pdComSymm(~Variety-1)
is read in as a string of characters from an external source:
ranEff -
On Aug 27, 2014, at 1:11 PM, Gang Chen wrote:
Good point!
Here is an example:
library(nlme)
fm - lme(yield ~ nitro, data=Oats, random=list(Block=pdComSymm(~Variety-1)))
One problem is that youa re misspelling the function name.
Now the problem I'm facing is that the following part
Sorry for the misspelling! And more importantly, thanks a lot for the
nice solution and for the quick help!
On Wed, Aug 27, 2014 at 4:22 PM, David Winsemius dwinsem...@comcast.net wrote:
On Aug 27, 2014, at 1:11 PM, Gang Chen wrote:
Good point!
Here is an example:
library(nlme)
fm -
do you have control over the external source?
if so, then something like
BlockFunction - pdComSymm
ranEff1 - ~Variety -1
fm - lme(yield ~ nitro, data=Oats,
random=list(Block=get(BlockFunction)(ranEff1)))
The above is untested. An example if get() is
get(sum)(1:4)
[1] 10
The main problem
On Aug 27, 2014, at 1:33 PM, Richard M. Heiberger wrote:
do you have control over the external source?
if so, then something like
BlockFunction - pdComSymm
ranEff1 - ~Variety -1
I doubt that would work, since it is not a formula object.
fm - lme(yield ~ nitro, data=Oats,
David,
you caught my typo of excess quotation marks. this should work
ranEff1 - ~Variety -1
random=list(Block=get(BlockFunction)(ranEff1)))
On Wed, Aug 27, 2014 at 4:41 PM, David Winsemius dwinsem...@comcast.net wrote:
On Aug 27, 2014, at 1:33 PM, Richard M. Heiberger wrote:
do you have
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