Modify default size and code refactoring

src/plot.jl

@@ -11,7 +11,7 @@ struct _MeanPlot; c; val;  end
 struct _DensityPlot; c; val;  end
 struct _HistogramPlot; c; val;  end
 struct _AutocorPlot; lags; val;  end
-struct _ViolinPlot; parameters; val; end
+struct _ViolinPlot; parameters; val; total_chains; end
 
 # define alias functions for old syntax
 const translationdict = Dict(
@@ -195,27 +195,28 @@ end
 )
 
     st = get(plotattributes, :seriestype, :traceplot)
+    total_chains = 0
     if st == :violinplot
         if combined
             parameters = string.(sections)
             val = Array(chains)[:, ]
-            _ViolinPlot(parameters, val)
-
+            total_chains = Integer(size(chains.value.data)[3])
+            _ViolinPlot(parameters, val, total_chains)
         elseif combined == false
-            data = Array(chains, append_chains = false)
-            parameters = vec(["param $(sections[i]).Chain $j"
-                        for i in 1:length(sections),
-                            j in 1:length(data)])
-            val_vec = vec([data[j][:,i] for i in 1:length(sections), j in 1:length(data)])
+            chain_arr = Array(chains, append_chains = false)
+            parameters = ["param $(sections[i]).Chain $j"
+                        for i in 1:length(sections)
+                        for j in 1:length(chain_arr)]
+            val_vec = [chain_arr[j][:,i]
+                        for i in 1:length(sections)
+                        for j in 1:length(chain_arr)]
             n_iter = length(val_vec[1])
-            n_chains = length(val_vec)
-            val = zeros(Float64, n_iter, n_chains)
-            for i in 1:n_iter
-                for j in 1:n_chains
-                    val[i,j] = val_vec[j][i]
-                end
+            total_chains = length(val_vec)
+            val = zeros(Float64, n_iter, total_chains)
+            for i in 1:total_chains
+                val[:,i] = val_vec[:][i]
             end
-            _ViolinPlot(parameters, val[:,])
+            _ViolinPlot(parameters, val[:,], total_chains)
         else
             error("Symbol names are interpreted as parameter names, only compatible with ",
               "`colordim = :chain`")
@@ -224,8 +225,18 @@ end
 end
 
 @recipe function f(p::_ViolinPlot)
-    seriestype := :violin
-    xaxis --> "Parameter"
-    p.parameters, p.val
-    #[collect(skipmissing(p.val[:,k])) for k in 1:size(p.val)]
+    @series begin
+        seriestype := :violin
+        xaxis --> "Parameter"
+        size --> (150*p.total_chains, 500)
+        p.parameters, p.val
+    end
+
+    @series begin
+        seriestype := :boxplot
+        bar_width --> 0.1
+        linewidth --> 2
+        fillalpha --> 0.8
+        p.parameters, p.val
+    end
 end