### Name: simplex
### Title: Simplex Method for Linear Programming Problems
### Aliases: simplex
### Keywords: optimize

### ** Examples

#  This example is taken from Exercise 7.5 of Gill, Murray,
#  and Wright (1991).
enj <- c(200, 6000, 3000, -200)
fat <- c(800, 6000, 1000, 400)
vitx <- c(50, 3, 150, 100)
vity <- c(10, 10, 75, 100)
vitz <- c(150, 35, 75, 5)
simplex(a = enj, A1 = fat, b1 = 13800, A2 = rbind(vitx, vity, vitz),
        b2 = c(600, 300, 550), maxi = TRUE)



