Ryacas0 (version 0.4.2)

bodyAsExpression: Get body of function as an expression.

Description

Get body of function as an expression.

Usage

bodyAsExpression(x)

Arguments

x

An R function.

Value

An expression.

Details

This function is similar to the R body function except that function returns a call object whereas this one returns an expression usable in Ryacas calculations.

See Also

body

Examples

# NOT RUN {

# construct an R function for the Burr probability density
# function (PDF) given the Burr cumulative distribution function (CDF)
BurrCDF <- function(x, c = 1, k = 1) 1-(1+x^c)^-k

# transfer CDF to yacas
yacas(BurrCDF)

# create a template for the PDF from the CDF
BurrPDF <- BurrCDF

# differentiate CDF and place resulting expression in body
body(BurrPDF) <- yacas(expression(deriv(BurrCDF(x,c,k))))[[1]]

# test out PDF
BurrPDF(1)

# }