在其他两个变量的条件下创建一个新变量

Question

I have two binary variables in the dataframe labels:

target1=[0,1,0,0,0.....1]
target2=[1,1,0,0,0.....0]

And I want to create a third variable that:

1. if target1=0 and target2=0, T=0,
2. if target1=1 and target2=0, T=1,
3. if target1=0 and target2=1, T=2,
4. if target1=1 and target2=1, T=3.

for i in range(len(labels)):
    if target1[i]==0 and target2[i]==0:
        labels['T']=0
    elif target1[i]==1 and target2[i]==0:
        labels['T']=1
    elif target1[i]==0 and target2[i]==1:
        labels['T']=2
    else:
        labels['T']=3

for some reason, the only outcome for is 0. I'm not sure what went wrong.

Answer 1

Probably you need to change

for i in range(len(labels)):

to

for i in range(len(target1)):

Otherwise you run loop only once or whatever you have items in labels