[英]Stacked Bar Plot from Dataframe in Pandas
我正在嘗試制作一個堆疊的條形圖,其中x軸是客戶名稱,y軸是呼叫次數,堆棧是月份。
我制作了一個數據透視表,如下所示:
ivot_table.head(3)
Out[23]:
Month 1 2 3 4 5 6 7 8 9 10 11 12
CompanyName
Company1 11 3 2 3 5 7 3 6 8 3 5 8
Company2 3 1 2 18 3 4 5 4 5 5 3 2
Company3 2 6 1 3 2 0 5 6 4 8 4 7
這是代碼
df = pd.read_csv('MYDATA.csv')
df = df.set_index('recvd_dttm')
df.index = pd.to_datetime(df.index, format='%m/%d/%Y %H:%M')
result = df.groupby([lambda idx: idx.month, 'CompanyName']).agg(len).reset_index()
result.columns = ['Month', 'CompanyName', 'NumberCalls']
pivot_table = result.pivot(index='Month', columns='CompanyName', values='NumberCalls').fillna(0)
s = pivot_table.sum().sort(ascending=False,inplace=False)
pivot_table = pivot_table.ix[:,s.index[:40]]
pivot_table = pivot_table.transpose()
pivot_table = pivot_table.reset_index()
pivot_table['CompanyName'] = [str(x) for x in pivot_table['CompanyName']]
Companies = list(pivot_table['CompanyName'])
months = ["1","2","3","4","5","6","7","8","9","10","11","12"]
pivot_table = pivot_table.set_index('CompanyName')
為了繪圖我已經嘗試過
ax = pivot_table.plot(kind='bar', title ="Bar chart",figsize=(15,10),legend=True, fontsize=12)
ax.set_xlabel("Company",fontsize=12)
ax.set_ylabel("Number of Calls",fontsize=12)
和
pivot_table.plot(kind='bar',stacked=True)
並嘗試在bokeh中做到這一點(對於這個情節來說,漂亮是很重要的):
months = OrderedDict(Jan=Jan, Feb=Feb, Mar=Mar, Apr=Apr,
May=May,Jun=Jun,Jul=Jul,Aug=Aug,Sep=Sep,Oct=Oct,Nov=Nov,Dec=Dec)
# any of the following commented are also alid Bar inputs
#medals = pd.DataFrame(medals)
#medals = list(medals.values())
output_file("stacked_bar.html")
bar = Bar(months, Companies, title="Stacked bars", stacked=True)
show(bar)
對於所有這三種繪圖方法,始終會出現此錯誤: ValueError: Length mismatch: Expected axis has 27 elements, new values have 3 elements
我已經查看了此ValueError,但是我仍然不明白這里發生了什么。
就我而言,我正在讀取錯誤的數據文件。
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