Hello,
I'd appreciate a suggestion on how to construct plots (barplots?) that use
means on the Y axis instead of density/count. I'd also like to use groups
and plot error or confidence interval bars on these graphs. I know this is a
read the manual situation. I'd appreciate help with what to read, or your
benevolence with some sample code.

I've looked at lattice and gplots2, but given my beginner status my efforts
are not propelling me very far.

Thank you kindly,
Michael Just

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