Kategorische Daten visualisieren

Interaktive Datenvisualisierung mit Bokeh

George Boorman

Core Curriculum Manager, DataCamp

Kategorische Daten

Kategorische Daten haben eine feste Anzahl an Optionen oder Labels.
- Beispiele: Geschlecht oder Geburtsland.
„Faktoren" ist ein weiterer Begriff für kategoriale Variablen

print(nba[["position", "team", "conference"]].head())

    position    team    conference
0   PG          OKC     West
1   PG          HOU     West
2   PG          BOS     East
3   C           NO      West
4   SG          TOR     East

Sortieren

unsorted_barplot

pos = nba.groupby("position")["points"].mean()
pos = pos.sort_values("points", ascending=False)

fig = figure(x_range=pos["position"], 
             x_axis_label="Position", 
             y_axis_label="Points per Game")
fig.vbar(x=pos["position"], top=pos["points"])
output_file(filename="sorted_plot.html")
show(fig)

sorted_barplot

Abstand

fig = figure(x_range=nba["position"], 
             x_axis_label="Position", 
             y_axis_label="Points per Game")
fig.vbar(x=nba["position"], top=nba["points"],

         width=0.9)

output_file(filename="padded_plot.html")
show(fig)

sorted_padded_barplot

Ausrichtung

fig = figure(x_range=nba['position'], 
             x_axis_label="Position", 
             y_axis_label="Points per Game")
fig.vbar(x=nba["position"], top=nba["points"], width=0.9)

fig.xaxis.major_label_orientation = 45

output_file(filename="rotated_x_label_plot.html")
show(fig)

Gedrehte x-Achsen-Beschriftungen

orientated_plot

Verschachtelte Kategorien

positions = ["Point Guard", "Shooting Guard", 
            "Small Forward", "Power Forward", "Center"]
conferences = ["East", "West"]

factors = [("Point Guard", "East"), ("Point Guard", "West"), 
           ("Shooting Guard", "East"), ("Shooting Guard", "West"), 
           ("Small Forward", "East"), ("Small Forward", "West"),
           ("Power Forward", "East"), ("Power Forward", "West"), 
           ("Center", "East"), ("Center", "West")]

Gruppiertes Balkendiagramm erstellen

from bokeh.models import FactorRange

fig = figure(x_range=FactorRange(*factors), y_axis_label="Points per Game")

fig.vbar(x=factors, top=nba["points"], width=0.9)

output_file(filename="grouped_bar_plot.html")
show(fig)

Gruppiertes Balkendiagramm

grouped_barplot

Lass uns üben!

Interaktive Datenvisualisierung mit Bokeh