error.bars

Hi, I'm trying to use the function "error.bars", but the program don't
find it, and I dont't found any package with this function. Is there some
another functin to draw barplots with error bars?

Sueli Rodrigues

Eng. Agr?noma - UNESP
Mestranda - USP/ESALQ
PPG-Solos e Nutri??o de Plantas
Fones (19)93442981
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