Hi I'm new to R so I apologise if this is a very basic question.
I'm trying to add text to a plot at point 11 on the x axis and point 900 on the y axis that will read t0= -4.0280
with the 0 as subscript. Where t0 <- -4.0280
To do this I've tried:
text(11,900,paste("t[0]=",t0),cex=0.8)
# which gives
't[0]= -4.0280'
text(11,900,expression(paste("t[0]=",t0)),cex=0.8)
# which gives
't[0]=t0'
# the closest I've gotten is:
text(11,900,expression(paste(t[0]==t0)),cex=0.8)
which will use subscript but return t0
instead of my value of -4.0280.
Could anyone show me where Ive gone wrong?
Cheers.
You can replace expression
with substitute
. There's no need for the paste
. The argument list(t0 = t0)
tells substitute
to replace the string t0
with the value of the object t0
:
plot(1,1)
t0 <- 1.3
text(1, 0.8, substitute(t[0]==t0, list(t0 = t0)), cex = 0.8)