I don't know of anything built in, but it is not that hard to come up
with something
fitting your description. Try this:
tmp <- rnorm(1000,100+(1:1000)/25,10+(1:1000)/100)
tmp2 <- (1:100)*10
tmp3 <- sapply( tmp2, function(x) quantile(tmp[1:x],
c(0.01,.1,.25,.75,.9,0.99)) )
plot(c(1,100),range(tmp3), type='n', xlab='Time', ylab='something')
segments( 1:100, tmp3[1,], 1:100, tmp3[6,], col=2, lwd=3 )
segments( 1:100, tmp3[2,], 1:100, tmp3[5,], col=3, lwd=3 )
segments( 1:100, tmp3[3,], 1:100, tmp3[4,], col=4, lwd=3 )
Greg Snow, Ph.D.
Statistical Data Center, LDS Hospital
Intermountain Health Care
greg.snow@ihc.com
(801) 408-8111
>>> "Gladwin, Philip [FI]" <philip.gladwin@citigroup.com> 10/14/05
05:49AM >>>
Hello,
Can Splus produce fan charts? My investigations so far suggest not.
These charts usually have time as the x asis and some other variable as
the
y-axis. As each point in time there is a solid line, which is colour
coded
along its length determined by some factor e.g. a probability.
They are a great favourite at the Bank of England for illustrating the
possible
future values of interest rates. The dark coloured regions suggesting
a high
probability of an interest rate, and a light coloured region suggesting
an
unlikely value of some interest rate.
kind regards
Phil,
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