如何在python ggplot中创建条形图?

问题描述：

我正在使用yhat的 ggplot库.我有以下熊猫DataFrame:

I'm using yhat's ggplot library. I have the following pandas DataFrame:

   degree  observed  percent observed  expected  percent expected
0       0         0               0.0         0          0.044551
1       1         1               0.1         1          0.138604
2       2         3               0.3         2          0.215607
3       3         4               0.4         2          0.223592
4       4         1               0.1         2          0.173905
5       5         1               0.1         1          0.108208

此刻，我正在执行以下操作(其中，函数第一行中第一行中返回的df是上面的DataFrame):

At the moment, I'm doing the following (where df returned in the first line in the first line in the function is the DataFrame above):

def chartObservedExpected(graph):
    df = observedExpected(graph)
    return ggplot(aes(x='degree', y='percent observed'), data=df) + \
           geom_point() + \
           ylim(-0.015,1.015) + \
           xlim(-0.05,max(df['degree']) + 0.25) + \
           labs("Degree","Proportion of Total") + \
           ggtitle("Observed Node Degree Distribution")

chartObservedExpected(G)

这就是我得到的:

但是，每当我尝试使用geom_bar()而不是geom_point()时，最终我只会得到100％的柱线.我只尝试了普通的geom_bar()和geom_bar(stat="percent observed")，但是似乎都没有用.这始终是我得到的:

However, whenever I try geom_bar() instead of geom_point(), I end up with just 100% bars. I've tried just plain geom_bar() and also geom_bar(stat="percent observed"), but neither seem to work. This is always what I get:

我想做的是模仿/复制以下内容:

What I'm trying to do is to mimic/reproduce the following:

有什么主意如何使酒吧的部分(或者整个事情)发挥作用吗?

Any idea how to get the bar part working (or the whole thing, for that matter)?

答

使用weight，这是一个示例:

from ggplot import *
import pandas as pd
df = pd.DataFrame({"x":[1,2,3,4], "y":[1,3,4,2]})
ggplot(aes(x="x", weight="y"), df) + geom_bar()

输出如下:

如何在python ggplot中创建条形图?

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