Posnorm {VGAM} | R Documentation |
Density, distribution function, quantile function and random generation for the univariate positive-normal distribution.
dposnorm(x, mean=0, sd=1, log=FALSE) 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.
If length(n) > 1 then the length is taken to be the number required. |
mean, sd, log |
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.
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) max(abs(pposnorm(Q, m=m) - probs)) # Should be 0 ## End(Not run)