Merge pull request #6 from tpapp/histogram-examples

Added two simple histogram examples.
queryverse · Aug 30, 2016 · cefe12c · cefe12c
2 parents 29f21a6 + e07902b
commit cefe12c
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diff --git a/examples/histogram.jl b/examples/histogram.jl
@@ -0,0 +1,9 @@
+using VegaLite
+using DataFrames
+
+# a simple histogram of random standard normal draws
+
+data_values(DataFrame(x=randn(200))) +
+    mark_bar() +
+    encoding_x_quant(:x; bin=Dict(:maxbins=>20), axis=Dict(:title=>"values")) +
+    encoding_y_quant(:*, aggregate="count", axis=Dict(:title=>"number of draws"))
diff --git a/examples/histogram_facet.jl b/examples/histogram_facet.jl
@@ -0,0 +1,14 @@
+using VegaLite
+using DataFrames
+
+## histograms by group
+
+df= DataFrame(group=rand(0:1, 200))
+df[:x] = df[:group]*2 + randn(size(df,1))
+
+data_values(df) +
+    mark_bar() +
+    encoding_x_quant(:x; bin=Dict(:maxbins=>15)) +
+    encoding_y_quant(:*, aggregate="count") +
+    encoding_row_nominal(:group) +
+    encoding_color_nominal(:group)