modeled.hist: Return the theoretical value for the histogram bar

In HelpersMG: Tools for Environmental Analyses, Ecotoxicology and Various R Functions

Return the theoretical value for the histogram bar

Description

Return the theoretical value for the histogram bar based on a model of distribution.

Usage

modeled.hist(breaks, FUN, ..., sum = 1)

Arguments

breaks	Vector with the breaks; it can be obtained directly from hist()
FUN	Function to be used to integrate the density, ex. pnorm
...	Parameters to be used by FUN
sum	Total numbers in the histogram; 1 for emperical frequencies

Details

modeled.hist returns the theoretical value for the histogram bar based on a model of distribution.

Value

A list with x (the center of the bar) and y components

Author(s)

Marc Girondot [e-mail]

Examples

## Not run: 
n <- rnorm(100, mean=10, sd=2)
breaks <- 0:20
hist(n, breaks=breaks)

s <- modeled.hist(breaks=breaks, FUN=pnorm, mean=10, sd=2, sum=100)

points(s$x, s$y, pch=19)
lines(s$x, s$y)

n <- rlnorm(100, meanlog=2, sdlog=0.4)
b <- hist(n, ylim=c(0, 70))

s <- modeled.hist(breaks=b$breaks, FUN=plnorm, meanlog=2, sdlog=0.4, sum=100)

points(s$x, s$y, pch=19)
lines(s$x, s$y)

## End(Not run)

HelpersMG documentation built on Sept. 12, 2024, 9:35 a.m.