Fix fitted_mean docstring (#137)

* Fix fitted_mean docstring

* Update Project.toml

Author: raphaelsaavedra

Project.toml

@@ -1,7 +1,7 @@
 name = "ScoreDrivenModels"
 uuid = "4a87933e-d659-11e9-0e65-7f40dedd4a3a"
 authors = ["guilhermebodin <[email protected]>, raphaelsaavedra <[email protected]>"]
-version = "0.1.9"
+version = "0.1.10"
 
 [deps]
 Distributions = "31c24e10-a181-5473-b8eb-7969acd0382f"

src/univariate_score_driven_recursion.jl

@@ -127,9 +127,11 @@ function update_param_tilde!(param_tilde::Matrix{T}, ω::Vector{T}, A::Dict{Int,
 end
 
 """
-    fitted_mean(gas::Model{D, T}, observations::Vector{T}, initial_params::Vector{T}) where {D, T}
+    fitted_mean(gas::Model{D, T}, observations::Vector{T}; 
+                initial_params::Matrix{T}=stationary_initial_params(gas)) where {D, T}
 
-return the fitted mean.. #TODO
+Returns the fitted mean of the in-sample series, i.e., the mean of the predictive 
+distribution at each time step using the fitted parameters in `gas`.
 """
 function fitted_mean(gas::Model{D, T}, observations::Vector{T}; 
                      initial_params::Matrix{T} = stationary_initial_params(gas)) where {D, T}
@@ -147,4 +149,4 @@ function fitted_mean(gas::Model{D, T}, observations::Vector{T};
     end
 
     return fitted_mean
-end
+end