Grid in an R plot

Question

Is there a command to easily add a grid onto an R plot?

Answer 1

I agree with cbare. Use abline to draw lines only where you really need.

Example from my last code:

abline(v=c(39448, 39814), col="grey40")
abline(h=c(-0.6, -0.4, -0.2, 0.2,0.4,0.6), col="grey10", lty="dotted") 

remember that:

v is for vertical lines. h for horizontal.

exploit the commands

lty for dotted line color for light coloured line

in order to obtain "no heavy grid".