dataframe循环方法
dataframe行循环5种方法1、下标循环df1 = dffor i in range(len(df)):if df.iloc[i]['test'] != 1:df1.iloc[i]['test'] = 02、Iterrows循环i = 0for ind, row in df.iterrows():if row['test'] != 1:df1.iloc[i]['test'] = 0i += 1
·
dataframe行循环5种方法
1、下标循环
df1 = df
for i in range(len(df)):
if df.iloc[i]['test'] != 1:
df1.iloc[i]['test'] = 0
2、Iterrows循环
i = 0
for ind, row in df.iterrows():
if row['test'] != 1:
df1.iloc[i]['test'] = 0
i += 1
3、Apply循环
df1['test'] = df['test'].apply(lambda x: x if x == 1 else 0)
lamda函数使用链接。
4、Pandas内置向量化函数
res = df.sum()
5、Numpy向量化函数
df_values = df.values
res = np.sum(df_values)
参考:https://blog.csdn.net/weixin_39744230/article/details/112113712
更多推荐
已为社区贡献1条内容
所有评论(0)