the mean and standard deviation of
the univariate normal distribution.
log
Logical.
If TRUE then the logarithm of the density is returned.
very.negative
Numeric, of length 1.
A large negative value.
For (q-mu)/sigma values less than this,
the value 0 is returned because
integrate tends to fail.
A warning is issued.
Similarly, if (q-mu)/sigma is greater than
abs(very.negative) then 1 is returned
with a warning.
smallno
See slash.
lower.tail, log.p
Same meaning as in pnorm
or qnorm.
Details
See slash, the VGAM family function
for estimating the two parameters by maximum likelihood estimation,
for the formula of the probability density function and other details.
Function pslash uses a for () loop and
integrate, meaning it's very slow.
It may also be inaccurate for extreme values of q,
and returns with 1 or 0 values when too extreme compared
to very.negative.
Value
dslash gives the density, and
pslash gives the distribution function,
rslash generates random deviates.
Note
pslash is very slow.
Author(s)
Thomas W. Yee and C. S. Chee
See Also
slash.
Examples
## Not run:
curve(dslash, col = "blue", ylab = "f(x)", -5, 5, ylim = c(0, 0.4), las = 1,
main = "Standard slash, normal and Cauchy densities", lwd = 2)
curve(dnorm, col = "black", lty = 2, lwd = 2, add = TRUE)
curve(dcauchy, col = "orange", lty = 3, lwd = 2, add = TRUE)
legend("topleft", c("slash", "normal", "Cauchy"), lty = 1:3,
col = c("blue","black","orange"), lwd = 2)
curve(pslash, col = "blue", -5, 5, ylim = 0:1)
pslash(c(-Inf, -20000, 20000, Inf)) # Gives a warning
## End(Not run)