CODEWITHSUNDEEP
rplottime-series
Zoë Clark
Zoë Clark

Reputation: 1364

R: Greek letters in ylab of `plot.ts()`

plot.ts() provides a convenient way to visualize multivariate time series. Unfortunately, I can't figure out how to annotate the (repeated) horizontal axes with Greek letters. The familiar approach for inserting Greek letters seems not to work and nor do some less clever approaches I've tried:

testdata = matrix(rnorm(300), ncol = 3)
# doesn't work
plot.ts(testdata, ylab = expression(paste(pi[0], " = 0")))
# doesn't work
plot.ts(testdata, ylab = c(expression(paste(pi[0], " = 0")),
                           expression(paste(pi[0], " = 1")),
                           expression(paste(pi[0], " = 2"))))
# doesn't work
colnames(testdata) = c(expression(paste(pi[0], " = 0")),
                       expression(paste(pi[0], " = 1")),
                       expression(paste(pi[0], " = 2")))
plot.ts(testdata)
# doesn't work
plot.ts(testdata, ylab = parse(text = y))

I've run out of ideas ...

Upvotes: 3

Views: 449

Answers (1)

Timo Kvamme
Timo Kvamme

Reputation: 2964

There is a solution using library(zoo)

testdata = matrix(rnorm(300), ncol = 3)
plot(zoo::as.zoo(testdata),ylab=c(expression(mu),expression(sigma),expression(beta)),main="Win!")

enter image description here

adapted from http://r.789695.n4.nabble.com/How-to-change-the-label-in-plot-ts-td796114.html

Upvotes: 3

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