Posnorm {VGAM} | R Documentation |
Density, distribution function, quantile function and random generation for the univariate positive-normal distribution.
dposnorm(x, mean=0, sd=1) pposnorm(q, mean=0, sd=1) qposnorm(p, mean=0, sd=1) rposnorm(n, mean=0, sd=1)
x, q |
vector of quantiles. |
p |
vector of probabilities. |
n |
number of observations. Must be a positive integer of length 1. |
mean, sd |
see rnorm . |
See posnormal1
, the VGAM family function
for estimating the parameters,
for the formula of the probability density function and other details.
dposnorm
gives the density,
pposnorm
gives the distribution function,
qposnorm
gives the quantile function, and
rposnorm
generates random deviates.
rposnorm()
may run very slowly if the mean is very negative.
T. W. Yee
## Not run: m = 0.8 x = seq(-1, 4, len=501) plot(x, dposnorm(x, m=m), type="l", ylim=0:1, las=1, ylab=paste("posnorm(m=",m,", sd=1)"), col="blue", main="Blue is density, red is cumulative distribution function", sub="Purple lines are the 10,20,...,90 percentiles") lines(x, pposnorm(x, m=m), col="red") abline(h=0) probs = seq(0.1, 0.9, by=0.1) Q = qposnorm(probs, m=m) lines(Q, dposnorm(Q, m=m), col="purple", lty=3, type="h") lines(Q, pposnorm(Q, m=m), col="purple", lty=3, type="h") abline(h=probs, col="purple", lty=3) pposnorm(Q, m=m) - probs # Should be all 0 ## End(Not run)