R: how to construct a mathematical expression from a character object?
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by Rob Hyndman
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Published on 2010-06-10T04:14:16Z
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2010/06/10
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In R, I'm wanting to create a graph with x axis label expression(varname), where varname is a character object. For example:
varname <- "beta[1]"
hist(rnorm(20),xlab=expression(varname))
But that gives me a graph with xlab="varname" rather than xlab=expression(beta[1]). How to I convince expression() to evaluate the variable?
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