value
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an optional list with elements to be used as the
value argument to other pdMat constructors. These
include: pdMat objects, positive-definite
matrices, one-sided linear formulas, vectors of character strings, or
numeric vectors. All elements in the list must be similar (e.g. all
one-sided formulas, or all numeric vectors). Defaults to
numeric(0) , corresponding to an uninitialized object.
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form
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an optional list of one-sided linear formula specifying the
row/column names for the block-diagonal elements of the matrix
represented by object . Because factors may be present in
form , the formulas needs to be evaluated on a data.frame to
resolve the names they defines. This argument is ignored when
value is a list of one-sided formulas. Defaults to NULL .
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nam
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an optional list of vector of character strings specifying the
row/column names for the block-diagonal elements of the matrix
represented by object. Each of its components must have
length equal to the dimension of the corresponding block-diagonal
element and unreplicated elements. This argument is ignored when
value is a list of vector of character strings. Defaults to
NULL .
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data
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an optional data frame in which to evaluate the variables
named in value and form . It is used to
obtain the levels for factors , which affect the
dimensions and the row/column names of the underlying matrix. If
NULL , no attempt is made to obtain information on
factors appearing the random effects model. Defaults to parent
frame from which the function was called.
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pdClass
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an optional vector of character strings naming the
pdMat classes to be assigned to the individual blocks in the
underlying matrix. If a single class is specified, it is used for all
block-diagonal elements. This argument will only be used when
value is missing, or its elements are not pdMat
objects. Defaults to "pdSymm" .
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