norMix2call: Transform "norMix" object into Call, Expression or Function

In nor1mix: Normal aka Gaussian 1-d Mixture Models

Transform "norMix" object into Call, Expression or Function

Description

E.g., for taking symbolic derivatives, it may be useful to get an R call, expression, or function in / of x from a specific "norMix" object.

Usage

norMix2call(obj, oneArg = TRUE)
## S3 method for class 'norMix'
as.expression(x, oneArg = TRUE, ...)
## S3 method for class 'norMix'
  as.function(x, oneArg = TRUE, envir = parent.frame(), ...)

Arguments

obj, x	an R object of class "norMix".
oneArg	logical specifying if expressions of the form dnorm((x - mu)/sig) should be used, i.e. one Argument only, instead of dnorm(x, mu, sig).
envir	an environment; often the default is perfect.
...	potentially further arguments (not used in any examples yet).

Value

according to the function used, an R ‘language’ object, i.e., a call, expression, or function, respectively.

Author(s)

Martin Maechler

See Also

norMix. Note that deriv() currently only works correctly in case of the default oneArg = TRUE.

Examples

(cMW2 <- norMix2call(MW.nm2))
deriv(cMW2, "x")

(fMW1 <- as.function  (MW.nm1))
(eMW3 <- as.expression(MW.nm3))
stopifnot(is.call      (cMW2),  is.call(norMix2call(MW.nm2, FALSE)),
          is.function  (fMW1),  is.function  (as.function  (MW.nm4)),
          is.expression(eMW3),  is.expression(as.expression(MW.nm5))
)

nor1mix documentation built on Nov. 14, 2023, 5:10 p.m.