formula.pdMat: Extract pdMat Formula
In nlme: Linear and Nonlinear Mixed Effects Models
formula.pdMat R Documentation
Extract pdMat Formula
Description
This method function extracts the formula associated with a
pdMat object, in which the column and row names are specified.
Usage
## S3 method for class 'pdMat'
formula(x, asList, ...)
Arguments
x
an object inheriting from class "pdMat", representing
a positive definite matrix.
asList
logical. Should the asList argument be applied to each
of the components? Never used.
...
some methods for this generic require additional
arguments. None are used in this method.
Value
if x has a formula attribute, its value is
returned, else NULL is returned.
Note
Because factors may be present in formula(x), the
pdMat object needs to have access to a data frame where the
variables named in the formula can be evaluated, before it can resolve
its row and column names from the formula.
Author(s)
José Pinheiro and Douglas Bates bates@stat.wisc.edu
See Also
pdMat
Examples
pd1 <- pdSymm(~Sex*age)
formula(pd1)
nlme documentation built on Nov. 27, 2023, 5:09 p.m.
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| formula.pdMat | R Documentation |
Extract pdMat Formula
Description
This method function extracts the formula associated with a
pdMat object, in which the column and row names are specified.
Usage
## S3 method for class 'pdMat'
formula(x, asList, ...)
Arguments
x |
an object inheriting from class |
asList |
logical. Should the asList argument be applied to each of the components? Never used. |
... |
some methods for this generic require additional arguments. None are used in this method. |
Value
if x has a formula attribute, its value is
returned, else NULL is returned.
Note
Because factors may be present in formula(x), the
pdMat object needs to have access to a data frame where the
variables named in the formula can be evaluated, before it can resolve
its row and column names from the formula.
Author(s)
José Pinheiro and Douglas Bates bates@stat.wisc.edu
See Also
pdMat
Examples
pd1 <- pdSymm(~Sex*age)
formula(pd1)
R Package Documentation
Browse R Packages
We want your feedback!
Note that we can't provide technical support on individual packages. You should contact the package authors for that.
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