vctrs methods for tf objects

These functions are the extensions that allow tf vectors to work with vctrs.

Usage

# S3 method for tfd_reg
vec_cast(x, to, ...)

# S3 method for tfd_irreg
vec_cast(x, to, ...)

# S3 method for tfd_reg
vec_cast.tfd_reg(x, to, ...)

# S3 method for tfd_irreg
vec_cast.tfd_reg(x, to, ...)

# S3 method for tfb_spline
vec_cast.tfd_reg(x, to, ...)

# S3 method for tfb_fpc
vec_cast.tfd_reg(x, to, ...)

# S3 method for tfd_reg
vec_cast.tfd_irreg(x, to, ...)

# S3 method for tfd_irreg
vec_cast.tfd_irreg(x, to, ...)

# S3 method for tfb_spline
vec_cast.tfd_irreg(x, to, ...)

# S3 method for tfb_fpc
vec_cast.tfd_irreg(x, to, ...)

# S3 method for tfb_spline
vec_cast(x, to, ...)

# S3 method for tfb_fpc
vec_cast(x, to, ...)

# S3 method for tfb_spline
vec_cast.tfb_spline(x, to, ...)

# S3 method for tfb_fpc
vec_cast.tfb_spline(x, to, ...)

# S3 method for tfb_spline
vec_cast.tfb_fpc(x, to, ...)

# S3 method for tfb_fpc
vec_cast.tfb_fpc(x, to, ...)

# S3 method for tfd_reg
vec_cast.tfb_spline(x, to, ...)

# S3 method for tfd_irreg
vec_cast.tfb_spline(x, to, ...)

# S3 method for tfd_reg
vec_cast.tfb_fpc(x, to, ...)

# S3 method for tfd_irreg
vec_cast.tfb_fpc(x, to, ...)

# S3 method for tfd_reg
vec_ptype2(x, y, ...)

# S3 method for tfd_reg
vec_ptype2.tfd_reg(x, y, ...)

# S3 method for tfd_irreg
vec_ptype2.tfd_reg(x, y, ...)

# S3 method for tfb_spline
vec_ptype2.tfd_reg(x, y, ...)

# S3 method for tfb_fpc
vec_ptype2.tfd_reg(x, y, ...)

# S3 method for tfd_irreg
vec_ptype2(x, y, ...)

# S3 method for tfd_reg
vec_ptype2.tfd_irreg(x, y, ...)

# S3 method for tfd_irreg
vec_ptype2.tfd_irreg(x, y, ...)

# S3 method for tfb_spline
vec_ptype2.tfd_irreg(x, y, ...)

# S3 method for tfb_fpc
vec_ptype2.tfd_irreg(x, y, ...)

# S3 method for tfb_spline
vec_ptype2(x, y, ...)

# S3 method for tfb_spline
vec_ptype2.tfb_spline(x, y, ...)

# S3 method for tfb_fpc
vec_ptype2.tfb_spline(x, y, ...)

# S3 method for tfd_reg
vec_ptype2.tfb_spline(x, y, ...)

# S3 method for tfd_irreg
vec_ptype2.tfb_spline(x, y, ...)

# S3 method for tfb_fpc
vec_ptype2(x, y, ...)

# S3 method for tfb_spline
vec_ptype2.tfb_fpc(x, y, ...)

# S3 method for tfb_fpc
vec_ptype2.tfb_fpc(x, y, ...)

# S3 method for tfd_reg
vec_ptype2.tfb_fpc(x, y, ...)

# S3 method for tfd_irreg
vec_ptype2.tfb_fpc(x, y, ...)

Arguments

x

Vectors to cast.

to

Type to cast to. If NULL, x will be returned as is.

...

For vec_cast_common(), vectors to cast. For vec_cast(), vec_cast_default(), and vec_restore(), these dots are only for future extensions and should be empty.

y

Vectors to cast.

Value

for vec_cast: the casted tf-vector, for vec_ptype2: the common prototype

Details

Notes on vec_cast: Use tf_rebase() to change the representations of tf-vectors, these methods are only for internal use -- automatic/implicit casting of tf objects is tricky because it's hard to determine automatically whether such an operation would lose precision (different bases with different expressivity? different argument grids?), and it's not generally clear which instances of which tf-subclasses should be considered the "richer" objects. Rules for casting:

• If the casted object's domain would not contain the entire original domain, no casting is possible (would lose data).

• Every cast that evaluates (basis) functions on different arg values is a lossy cast, since it might lose precision (vctrs::maybe_lossy_cast).

• As long as the casted object's domain contains the entire original domain:

  • every tfd_reg, tfd_irreg or tfb can always be cast into an equivalent tfd_irreg (which may also change its evaluator and domain).

  • every tfd_reg can always be cast to tfd_reg (which may change its evaluator and domain)

  • every tfb can be cast losslessly to tfd (regular or irregular, note it's lossless only on the original arg-grid)

• Any cast of a tfd into tfb is potentially lossy (because we don't know how expressive the chosen basis is)

• Only tfb with identical bases and domains can be cast into one another losslessly

See also

vctrs::vec_cast(), vctrs::vec_ptype2()