pandas 的sum()和count()有什么区别? [英] What is the difference between sum() and count() in pandas?
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问题描述
您能帮助我理解以下提到的陈述之间的区别吗?鉴于 Survived
列包含二进制数据(0,1),它们给出不同的答案:
Can you help me understand the difference between the statements mentioned below? Given that Survived
column contains binary data (0,1), they give different answers:
df_train[df_train.Sex == 'female'].Survived.count()
df_train[df_train.Sex == 'female'].Survived.sum()
推荐答案
sum()表示1 + 0 =1。如果数据是3和3然后返回6。
sum() is for like 1+0 = 1. if data is 3 and 3 then it return 6.
count()返回行数。因此它将返回2。
count() return number of row. so it will return 2.
简单:)
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