python中R的“table”的等价物

我们可以用 crosstab 从…起 pandas

import numpy as np;
import pandas as pd;
x = np.array([1, 1, 1, 1, 2, 2]);
y = np.array(["a", "a", "b", "a", "a", "b"]);
pd.crosstab(x, y, rownames = ['x'], colnames = ['y']);
#  y  a  b
#x
#1  3  1
#2  1  1

计数发生次数 R:

sort(table(df$source), decreasing = TRUE)

巨蟒熊猫:

df.source.value_counts() 
#or
df["source"].value_counts()

资料来源: R vs Python - a One-on-One Comparison

用于计算两列之间的出现次数

带R

table(cdc$gender,cdc$smoke100)

使用python

pd.crosstab(index=df['gender'], columns=df['smoke100'])

资料来源: look at this answer