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. Agrônoma - UNESP Mestranda - USP/ESALQ PPG-Solos e Nutrição de Plantas Fones (19)93442981 (19)33719762