Dear People,
I need to make a label which both contains math notation as well as substitutes a value for an object. In the following label, len and theta are one dim variables, and I am substituting their values appropriately. This label looks fine except that I want the greek symbol for theta to appear instead of the word `theta'. How can I do so most easily? I don't understand the underlying mechanisms well enough to work it out for myself. Thanks in advance.
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Faheem.
main=paste("Monotonic Multigamma run (n=", deparse(substitute(len)),", ", expression(theta),"=", deparse(substitute(theta)),").")
No, it won't work that way, because you have to specify an S expression in order to get mathematical annotation. An expression within paste() will be converted to a character string.
What you ca do is the other way round:
t1 <- theta # you cannot use theta as variable and math. symbol plot(1:10, main = substitute("Monotonic Multigamma run (" * n == len * ", " * theta == t1 * ").", list(len = len, t1 = t1)))
See also ?plotmath or that small article in R News:
Ligges (2002): R Help Desk: Automation of Mathematical Annotation in Plots. R News 2(3), 32-34.
Uwe Ligges
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