[R] beginner's question: Graphical presentation of t test

[peter robinson]

Hi,

Is there any way to use R to present t test results for three groups of 
experiments, each of which involves several parallel experiment series with 
groups of control vs treated. I would like to present the average fold change 
of the experimental parameter (concentration of enzymes) as bars with 
standard error and the p value above the bar. So, there should be two groups 
(control vs treated)  of three bars for the three enzymes.

Thanks

Peter