I dont as yet fully understand how trellis works. Advice would be much
appreciated.
I have a factor variable (2 levels) and a continuous variable and I am able
to plot a histogram of the frequencies of the continuous variable for each
level of the factor variable using :
histogram( ~ class | one, data = data,
xlab = "Grades", type = "density",
panel = function(x, ...) {
panel.histogram(x, ...)
panel.mathdensity(dmathjavascript:G('/cgi-bin/hmhome?');
Today = dnorm, col = "black",
args = list(mean=mean(x),sd=sd(x)))
The two distributions overlap over an area and I would like to draw vertical
lines to demark the lower tail of the distribution which has a higher
median, and the right tail of the distribution with lower median.
Any suggestion would be really helpful.
thanks
ul-nadi
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