Dear friends,
I am trying to display a sequence of characters x_1, x_2, ... x_30 on a plot.
I know that I can use expression to do this by expression("x"[1]),
etc. But, how do I do this efficiently for an entire sequence without having to
type the individual expressions one by one?
Many thanks,
Ranjan
On 18/04/2020 3:10 p.m., Ranjan Maitra wrote:> Dear friends, > > I am trying to display a sequence of characters x_1, x_2, ... x_30 on a plot. > > I know that I can use expression to do this by expression("x"[1]), etc. But, how do I do this efficiently for an entire sequence without having to type the individual expressions one by one?e <- expression() for (i in 1:30) e <- c(e, eval(substitute(expression(x[i]), list(i = i)))) plot(1:30, 1:30, type="n") text(1:30, 1:30, labels=e) Duncan Murdoch