我有以下数据帧df:
timestamp objectId result
0 2015-11-24 09:00:00 Stress 3
1 2015-11-24 09:00:00 Productivity 0
2 2015-11-24 09:00:00 Abilities 4
3 2015-11-24 09:00:00 Challenge 0
4 2015-11-24 10:00:00 Productivity 87
5 2015-11-24 10:00:00 Abilities 84
6 2015-11-24 10:00:00 Challenge 58
7 2015-11-24 10:00:00 Stress 25
8 2015-11-24 11:00:00 Productivity 93
9 2015-11-24 11:00:00 Abilities 93
10 2015-11-24 11:00:00 Challenge 93
11 2015-11-24 11:00:00 Stress 19
12 2015-11-24 12:00:00 Challenge 90
13 2015-11-24 12:00:00 Abilities 96
14 2015-11-24 12:00:00 Stress 94
15 2015-11-24 12:00:00 Productivity 88
16 2015-11-24 13:00:00 Productivity 12
17 2015-11-24 13:00:00 Challenge 17
18 2015-11-24 13:00:00 Abilities 89
19 2015-11-24 13:00:00 Stress 13
我想实现如下的条形图
而不是a,b,c,d在ObjectID列中将有标签,y轴应该对应于列结果,而x轴应该是列时间戳分组的值.
我尝试了几件事,但没有任何效果.这是最接近的,但plot()方法不通过参数进行任何自定义(例如,kind =’bar’不起作用).
groups = df.groupby('objectId')
sgb = groups['result']
sgb.plot()
还有其他想法吗?
解决方法:
@NaderHisham的答案是一个非常简单的解决方案!
但仅作为参考,如果由于某种原因不能使用seaborn,这是一个纯粹的pandas / matplotlib解决方案:
您需要重塑数据,因此不同的objectIds成为列:
In [20]: df.set_index(['timestamp', 'objectId'])['result'].unstack()
Out[20]:
objectId Abilities Challenge Productivity Stress
timestamp
09:00:00 4 0 0 3
10:00:00 84 58 87 25
11:00:00 93 93 93 19
12:00:00 96 90 88 94
13:00:00 89 17 12 13
如果你制作一个条形图,你会得到所需的结果:
In [24]: df.set_index(['timestamp', 'objectId'])['result'].unstack().plot(kind='bar')
Out[24]: <matplotlib.axes._subplots.AxesSubplot at 0xc44a5c0>