I'm using R-2.6.2 on Fedora Linux 9. I've been experimenting with plotmath.
I wish it were easier to combine expressions in plotmath with values from the R program itself. There are two parameters in the following example, the mean "mymean" and standard deviation "mystd". I am able to use bquote to write elements into the graph title like mu = mymean and R will plot the symbol "mu" and the value of mymean from the program. But I want to combine that result in a string along with other results. Can I combine to result like this "Normal( mu = mymean , sigma = mystd)" Where symbols mu and sigma are replaced with Greek and mymean and mystd are drawn from program? ### Filename: Normal1_2008.R ### Paul Johnson March 31, 2008 ### This code should be available somewhere in http://pj.freefaculty.org. If it is not ### email me <[EMAIL PROTECTED]> mymean <- 0 mystd <- 1.5 myx <- seq( mymean - 3*mystd, mymean+ 3*mystd, length.out=500) myDensity <- dnorm(myx,mean=mymean,sd=mystd) ## This works plot(myx, myDensity, type="n", xlab="X", ylab="Probability Density ", main=expression(mu == 0)) ## This works plot(myx, myDensity, type="n", xlab="X", ylab="Probability Density ", main=expression(sigma == 1.5)) ## This works t1 <- bquote( mu== .(mymean)) plot(myx, myDensity, type="n", xlab="X", ylab="Probability Density ", main= t1 ) ## This works t2 <- bquote( sigma== .(mystd)) plot(myx, myDensity, type="n", xlab="X", ylab="Probability Density ", main=t2) ## Can't figure how to combine t1 and t2 into plot title ### This fails! ### plot(myx, myDensity, type="n", xlab="X", ylab="Probability Density ", main=paste( t1,t2) ) plot(myx, myDensity, type="n", xlab="X", ylab="Probability Density ", main= t1 ) ## Can drop sigma in as margin text, though, on side 3. mtext(t2, 3) lines(myx,myDensity,lty=4, col=4) ### change line type & color if you want ############################ Supposing there is a way to do this, could I submit a working example to be added to the help page for plotmath ? How could I go about that? -- Paul E. Johnson Professor, Political Science 1541 Lilac Lane, Room 504 University of Kansas ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
