Inv.gaussian {VGAM} | R Documentation |
Density and distribution function
for the inverse Gaussian distribution with parameters
mu
and lambda
.
dinv.gaussian(x, mu, lambda) pinv.gaussian(q, mu, lambda)
x, q |
vector of quantiles. |
mu |
the mean parameter. |
lambda |
the lambda parameter. |
See inv.gaussianff
, the VGAM family function
for estimating both parameters by maximum likelihood estimation,
for the formula of the probability density function.
dinv.gaussian
gives the density,
pinv.gaussian
gives the distribution function.
Currently qinv.gaussian
and rinv.gaussian
are unavailable.
T. W. Yee
Johnson, N. L. and Kotz, S. and Balakrishnan, N. (1994) Continuous Univariate Distributions, 2nd edition, Volume 1, New York: Wiley.
## Not run: x = seq(-0.05, 4, len=300) plot(x, dinv.gaussian(x, mu=1, lambda=1), type="l", col="blue", las=1, main="blue is density, red is cumulative distribution function") abline(h=0, col="blue", lty=2) lines(x, pinv.gaussian(x, mu=1, lambda=1), type="l", col="red") ## End(Not run)