Create templates for use by alike. Currently somewhat
experimental; behavior may change in future.
Usage
abstract(x, ...)
# S3 method for data.frame
abstract(x, ...)
# S3 method for default
abstract(x, ...)
# S3 method for array
abstract(x, ...)
# S3 method for matrix
abstract(x, ...)
# S3 method for list
abstract(x, ...)
# S3 method for lm
abstract(x, ...)
# S3 method for environment
abstract(x, ...)
# S3 method for ts
abstract(x, what = c("start", "end", "frequency"), ...)
Value
abstracted object
Arguments
x
the object to abstract
...
arguments for methods that require further arguments
what,
for time series which portion of the ts attribute to
abstract, by default all three are abstracted, but you can select, any one,
two, or all
Time Series
alike will treat time series parameter components with zero in
them as wildcards. This function allows you to create these wild card time
series attributes since R does not allow direct creation/modification of
ts attributes with zero values.
Make sure you do not try to use the templates you create with this for
anything other than as alike templates since the result is
likely undefined given R expects non zero values for the ts
attribute and attempts to prevent such attributes.
Details
abstract is intended to create templates for use by
alike. The result of abstraction is often a partially
specified object. This type of object may not be suited for use in typical
R computations and may cause errors (or worse) if you try to use them as
normal R objects.
There is no guarantee that the abstracted object is suitable for use
as a template to alike as is. You may need to modify it further so
that it suits your purposes.
abstract is an S3 generic. The default method will
dispatch on implicit classes, so if you attempt to abstract an object
without an explicit abstract method, it will get abstracted based on
its implicit class. If you define your own abstract method and do not
wish further abstraction based on implicit classes do not use
NextMethod.