[R] the commands to easily find the dual variables of a standard LP problem

[Yong Wang]

Dear  all
I use "simplex" to resolve a standard LP problem, further, I want to know 
the dual variables of the LP problem (the dual variables when the standard 
LP ,or the primal problem, get its optimal solution).
 
Is there any command for me to easily get them(the dual variables)?
any suggestions appreciated
thank you in advance

best regards
y.w