[R] Plotting expressions with indicies

[Prof Brian Ripley]

On Mon, 12 May 2003, Noel Yvonnick wrote:

> I would like to plot a series of math symbols on a graph with ordered indicies 
> : expression(delta[1]) expression(delta[2]) etc.
> 
> Is there a mean to write this in a for loop ?
> 
> for(i in 1:6) text(i,i,expression(delta[i]))
> 
> does not work ('i' is not evaluated).

Try

> plot(1:6, type="n")
> for(i in 1:6) text(i,i,substitute(delta[i], list(i=i)))



-- 
Brian D. Ripley,                  ripley at stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford,             Tel:  +44 1865 272861 (self)
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