add chapter 11

2022-02-14 16:37:49 +01:00
parent 3d33b999c9
commit a7f0c90b46
2 changed files with 78 additions and 3 deletions
--- a/appB.jl
+++ b/appB.jl
@@ -165,6 +165,12 @@ proptable([walk_unique_2ahead() for _ in 1:10^5])
@time wide = DataFrame(ones(1, 10_000), :auto);
@time Tables.columntable(wide);

+# Code for exercise 11.2
+
+using Statistics
+Dict(key.city => mean(df.rainfall) for (key, df) in pairs(gdf_city))
+combine(gdf_city, :rainfall => mean)
+
 # Code for exercise 12.1

 cg = complete_graph(37700)