[R] Any way to apply TWO functions with tapply()?

I need to compute the mean and the standard deviation of a data set and would like to have the results in one table/data frame. I call tapply() two times and do then merge the resulting tables to have them all in one table. Is there any way to tell tapply() to use the functions mean and sd within

[R] How to rbind listed data frames?

I made a list (dataList) of data frames. The list looks like this (the first two elements): [[1]] est cond targets 1 400 exo_depth_65Hautklinik 2 300 exo_depth_65 Ostturm_UKM 3 200 exo_depth_65 Kreuzung_Ro