[R] x axis point labels

Michaell Taylor
Mon, 24 Sep 2001 20:58:13 -0000

I am attempting to manually specify x axis value labels (NOT x axis label as
in xlab) on a density plot.  Generally speaking, I would like to erase the
default x axis point labels and replace them with arbitrary x axis point
labels relating to specific CDF points.

I am sure this can be done, but it isn't obvious to me how.  Has anyone done
this before?

My R code follows if it helps (new to R so please excuse any awkwardness that
you notice.)

plot(density(gdp), main="Probability Distribution\n of 2002 US GDP
Forecast",lwd=3,
	xlim=c(-9,9), ylim=c(0,.3),xlab="Percent Real GDP Growth")
par(new=T)
newline _ cbind(c(gdp[5000/2],gdp[5000/2]),c(0,.25))
newline1 _ cbind(c(gdp[.05*5000],gdp[.05*5000]),c(0,.15))
newline2 _ cbind(c(gdp[.95*5000],gdp[.95*5000]),c(0,.15))
newline3 _ cbind(c(gdp[.99*5000],gdp[.99*5000]),c(0,.1))
newline4 _ cbind(c(gdp[.01*5000],gdp[.01*5000]),c(0,.1))
lines(newline, lwd=2)
lines(newline1)
lines(newline2)
lines(newline3)
lines(newline4)
text(gdp[5000/2],.29,"Median\nForecast")
text(gdp[5000*.05],.19,"0.05 Prob.\nForecast")
text(gdp[5000*.95],.24,"0.95 Prob.\nForecast")
text(gdp[5000*.99],.14,"0.99 Prob.\nForecast")
text(gdp[5000*.01],.14,"0.01 Prob.\nForecast")


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Michaell Taylor, PhD