[R] Mixing grid and base graphics--need help understanding this quirk

[Kevin Wright]

My setup: Windows 2000, R 2.3.1

When I start a brand new session of R and paste the code below into R,
the graphic device shows "Some text" in the lower left corner.  If I
paste the code into the command window again, then "Some text" does
not appear in the lower left corner.  Why is this?

require(grid)
par(mfrow=c(1,2))
plot(1:10)
plot(-10:1)
par(mfrow=c(1,1))
pushViewport(viewport(.04, .04, width=stringWidth("Some text"),
height=unit(2,"lines"),
                      name="pagenum", gp=gpar(fontsize=10)))
grid.text("Some text", gp=gpar(col="gray30"),
          just=c("left","bottom"))
popViewport()


Kevin Wright