[英]Stacked Bar Plot from Dataframe in Pandas
I'm trying to make a stacked bar graph where the x-axes are customer names, the y axes are the number of calls, and the stacks are the months. 我正在尝试制作一个堆叠的条形图,其中x轴是客户名称,y轴是呼叫次数,堆栈是月份。
I have made a pivot_table that looks like this: 我制作了一个数据透视表,如下所示:
pivot_table.head(3) 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
Here is the code 这是代码
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')
and for plotting I've tried 为了绘图我已经尝试过
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)
and 和
pivot_table.plot(kind='bar',stacked=True)
and tried to do it in bokeh (being pretty is important for this plot) with: 并尝试在bokeh中做到这一点(对于这个情节来说,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)
And for all three plotting methods, keep getting this error: ValueError: Length mismatch: Expected axis has 27 elements, new values have 3 elements
I've looked up this ValueError but I still don't understand what's going on here. 对于所有这三种绘图方法,始终会出现此错误:
ValueError: Length mismatch: Expected axis has 27 elements, new values have 3 elements
我已经查看了此ValueError,但是我仍然不明白这里发生了什么。
就我而言,我正在读取错误的数据文件。
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