I am trying to calculate the standard deviation of the array waiting_Time. But, i get the error “MethodError: objects of type Float64 are not callable”. What am I doing wrong?
Here is my code:
using Distributions function simulation(l, m, s, n) tables = 3n ### the total tables each waiter can serve departure = zeros(tables) waiting_Time = zeros(0) sigma = 1 ### the std of waiting_Time; updated in our while loop counter = 0.0 while (counter <= (1.96(sigma/.01))^2) ### while our confidence in the mean waiting timem is below 95% counter = counter + 1 u = rand(1) arrival = -(1/l)*log.(u) ### generate our customer arrival dine = rand(Normal(m,s), 1) ### generate the dinning time of our arrived customer if (arrival >= minimum(departure)) wait = 0.0 departure[indmin(departure)] = arrival + dine push!(waiting_Time,wait) else wait = minimum(departure) - arrival departure[indmin(departure)] = arrival + wait + dine push!(waiting_Time,wait) end if (length(waiting_Time) > tables) println(waiting_Time) for i in 1:length(waiting_Time) println(typeof(waiting_Time[i])) end sigma = std(waiting_Time) end end results = (mean(waiting_Time)) return results end