[R] Help with plotmath

[Kenneth Cabrera]

Hi R users:

How can I have several subscript number with a comma in a plot.

I would like to have the LaTeX equivalent of

x_{i,j}.

I try:

plot(1:10,1:10,type="n")
text(5,5,expression(x[i,j]))

but it doesn´t work.

Thank you for your help.