[R] adding sem to a plot

[Luis Rideau Cruz]

R-help,

I have a barplot and I wish to add standard erros (or deviations) bars to it.
How?

Thank you

Luis Ridao Cruz
Fiskirannsóknarstovan
Nóatún 1
P.O. Box 3051
FR-110 Tórshavn
Faroe Islands
Phone:             +298 353900
Phone(direct): +298 353912
Mobile:             +298 580800
Fax:                 +298 353901
E-mail:              luisr at frs.fo
Web:                www.frs.fo