Set a default argument of num_reps=1 for the case of `init::Vector{…

…Int}`

src/mc_tools.jl

@@ -303,24 +303,19 @@ Simulate time series of state transitions of the Markov chain `mc`.
 - `mc::MarkovChain` : MarkovChain instance.
 - `ts_length::Int` : Length of each simulation.
 - `init::Vector{Int}` : Vector containing initial states.
-- `;num_reps::Union{Int, Void}(nothing)` : Number of repetitions of simulation.
+- `;num_reps::Int(1)` : Number of repetitions of simulation.
 
 ##### Returns
 
 - `X::Array{Int}` : Array containing the sample paths as columns, of shape
-(ts_length, k), where k = length(init) if num_reps=nothing, and k =
-length(init)*num_reps otherwise.
+(ts_length, k), where k = length(init)*num_reps.
 
 """
 function simulate(mc::MarkovChain,
  ts_length::Int,
  init::Vector{Int};
- num_reps::Union{Int, Void}=nothing)
- k = length(init)
- if num_reps == nothing
- num_reps = 1
- end
- k *= num_reps
+ num_reps::Int=1)
+ k = length(init) * num_reps
  X = Array(Int, ts_length, k)
  X[1, :] = repmat(init, num_reps)