问题描述
如果单元格中的数字大于720且小于1080,我想为每行360减去。如何为df中的每一行执行if语句?
我尝试过:
if row in (df['position']>720 and df['position']<1080):
df['720-1080']=(df['position']-360)
解决方法
将Series.mask
与Series.between
一起使用时使用掩码:
df = pd.DataFrame({'position':[7000,800,1000]})
mask = df['position'].between(720,1080,inclusive=False)
#alternative
#mask = (df['position']>720) & (df['position']<1080)
df['720-1080'] = df['position'].mask(mask,df['position'] - 360)
print (df)
position 720-1080
0 7000 7000
1 800 440
2 1000 640