Extract row corresponding to minimum value of a variable by group

Question

I wish to (1) group data by one variable (State), (2) within each group find the row of minimum value of another variable (Employees), and (3) extr

Answer 1

Corrected plyr solution:

ddply(df, .(State), function(x) x[which.min(x$Employees),])
#   State Company Employees
# 1    AK       D        24
# 2    RI       E        19

thanks to @joel.wilson