Creating nested categories

For your final plot, the estate agents would like you to present property sales across the year, displaying months and quarters on the x-axis.

Some of the code to add months and quarters into the Melbourne dataset has been preloaded for you. The factors variable, which will represent months and their corresponding quarters, needs to be created. The data must be also grouped by these two newly created columns to calculate total sales by taking the sum of the "price" column.

Latihan ini adalah bagian dari kursus

Interactive Data Visualization with Bokeh

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Petunjuk latihan

Complete factors, entering the relevant quarters and associated months.
Create grouped_melb by grouping melb by "month" and "quarter", calculating the total of the "price" column.

Latihan interaktif praktis

Cobalah latihan ini dengan menyelesaikan kode contoh berikut.

melb["month"] = melb["date"].dt.month
quarters = {1: "Q1", 2:"Q1", 3:"Q1", 4:"Q2", 5:"Q2", 6:"Q2", 7:"Q3", 8:"Q3", 9:"Q3", 10:"Q4", 11:"Q4", 12:"Q4"}
melb["quarter"] = melb["month"].replace(quarters)
melb["month"] = melb["month"].replace({1:"January", 2:"February", 3:"March", 4:"April", 5:"May", 6:"June", 7:"July", 8:"August", 9:"September", 10:"October", 11:"November", 12:"December"})

# Create factors
factors = [("Q1", "January"), ("____", "February"), ("____", "March"), 
           ("Q2", "April"), ("____", "____"), ("____", "____"), 
           ("Q3", "July"), ("____", "____"), ("____", "____"), 
           ("Q4", "October"), ("____", "____"), ("____", "____")]

# Calculate total sales by month and quarter
grouped_melb = melb.groupby(["____", "____"], as_index=False)["____"].sum()
grouped_melb.sort_values("quarter", inplace=True)
print(grouped_melb.head())

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