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add combine in ch9

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Bogumił Kamiński committed 2022-03-24 20:09:55 +01:00
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ch09.jl
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@@ -157,3 +157,5 @@ ratings_predict = float.(sort(ratings))
popularity_predict = predict(model, ratings_predict) popularity_predict = predict(model, ratings_predict)
plot!(ratings_predict, popularity_predict; width=5, color="black") plot!(ratings_predict, popularity_predict; width=5, color="black")
combine(groupby(good, :Rating), :Popularity => mean)