getFunctionEnvelopePara: Function to return function envelope for parabola

In catenary: Fits a Catenary to Given Points

Description

Use boostrap to get bands of possible fits to data using quadratic

Usage

getFunctionEnvelopePara(data, R = 1000, x)

Arguments

data	data frame with columns x and y

Value

data frame with x, lwr and upr

Note

February 12 2013

Author(s)

Jono Tuke, Matthew Roughan

Examples

x <- runif(100,0,10)
y <- x^2 + 2*x + 3 + rnorm(100,sd=20)
df <- data.frame(x=x,y=y)
plot(y~x,data=df,pch=16,cex=0.5)
bounds <- getFunctionEnvelopePara(data=df,x=seq(0,10,l=100))
lines(bounds$x,bounds$lwr)
lines(bounds$x,bounds$upr)

Example output

Attaching package: ‘catenary’

The following object is masked from ‘package:methods’:

    show

catenary documentation built on May 2, 2019, 10:51 a.m.