[R] greek in main title
Mahbub Latif
ahmlatif at yahoo.com
Tue Jul 22 17:44:59 CEST 2003
Hi,
change the name of function argument "theta" to
something else say "thta" and then use the following
....
heading <- expression(paste("Exp w/ ", theta, "=",
thta, ", n = ", n[i]))
Hope it will help...
Mahbub.
--- Oldradio69 at aol.com wrote:
> Hello,
>
> I have written a function that demonstrates the CLT
> by
> generating samples following the exponential
> distribution,
> calculating the means, plotting the histogram, and
> drawing
> the limiting normal curve as an overlay. I have the
> title
> of each histogram state the sample size and rate
> (1/theta)
> for the exponential (the output is actually 4
> histograms),
> but I can't get the greek letter theta to appear in
> the
> heading. Is this possible? I can get nontext for
> the xlab
> and ylab pretty easily.
>
> Thanks, Jason
>
> Below is my code. Currently it just writes out
> "theta."
>
> function (theta)
> {
> layout(matrix(c(1:4),2,2,byrow=TRUE))
> par(bg = "cornsilk")
> n <- c(1,10,25,50)
> for(i in 1:4) {
> xbar <- rep(0, 1000)
> for (j in 1:1000)
> xbar[j] <- mean(rexp(n[i], rate = 1/theta))
> heading <- paste("Exp w/ theta =", theta, ", n
> = ", n[i])
> hist(xbar, prob = TRUE, breaks = "FD", main =
> title(heading, font.main = 6),
> col = "lightgray", xlab =
> expression(bar(x)))
> xbar <- sort(xbar)
> points(xbar, dnorm(xbar, mean = theta, sd =
> theta/sqrt(n[i])),
> type = "l", col = 2)
> }
> }
>
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>
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