[R] regarding saving R graphis images directly to directory

[SAURIN]

Dear R,

I am student at University of new haven, CT.I am trying to run my R scripts where I don't have
X11() authentication to my account. I run those R scripts and when I generate any graphics I get
error and it comes out from system. 

if possible , please let me know how can i run R scripts ...so, that I just SAVE BOX PLOT or
HISTOGRAM jpeg or png files to current directory without poping up on screen or without using any
devices or make them silent..or something.


Thakn you,
Saurin Jnai