panel.qqmathline: Useful panel function with qqmath
Description
Useful panel function with qqmath. Draws a line passing through the
points determined by the .25 and .75 quantiles of the sample and the
theoretical distribution.
Usage
panel.qqmathline(y, distribution, ...)
Arguments
y
The original sample, possibly reduced to a fewer number of
quantiles, as determined by the f.value argument to
qqmath
distribution
quantile function for reference theoretical
distribution.