stepR (version 1.0-1)

family: Family of distributions

Description

Families of distributions supported by package stepR.

Details

Package stepR supports several families of distributions (mainly exponential) to model the data, some of which require additional (fixed) parameters. In particular, the following families are available:

[object Object],[object Object],[object Object],[object Object],[object Object]

The family is selected via the family argument, providing the corresponding string, while the param argument contains the parameters if any.

See Also

Distributions, dnorm, dpois, dbinom, dfilter, sdrobnorm

Examples

# illustrating different families fitted to the same binomial data set
size <- 200
n <- 200
# truth
p <- 10^seq(-3, -0.1, length = n)
# data
y <- rbinom(n, size, p)
plot(y)
lines(size * p, col = "red")
# fit 4 jumps, binomial family
jumps <- 4
bfit <- steppath(y, family = "binomial", param = size, max.blocks = jumps)
lines(bfit[[jumps]], col = "orange")
# Gaussian approximation with estimated variance
gfit <- steppath(y, family = "gauss", max.blocks = jumps)
lines(gfit[[jumps]], col = "green3", lty = 2)
# Poisson approximation
pfit <- steppath(y, family = "poisson", max.blocks = jumps)
lines(pfit[[jumps]], col = "blue", lty = 2)
legend("topleft", legend = c("binomial", "gauss", "poisson"), lwd = 2,
  col = c("orange", "green3", "blue"))