[R] I want to fill a column in with 0 or 1 depending on another columns input

[kevin123]

This is a portion of my data frame

 MemberID    Specialty                 Surgery          Internal
1 42286978     Surgery                      NA                   NA
2 97903248     Internal                     NA                   NA
3  2759427      Internal                      NA                   NA      
4 73570559    Surgery                        NA                  NA

There are four columns. In the Specialty column there are two options
Surgery/Internal, These options have there own columns. 

I want to fill a column in with 0 or 1 depending on another columns input

I am finding it hard to figure out how to do the following:

    MemberID    Specialty                 Surgery          Internal
1  42286978     Surgery                      1                   0
2  97903248     Internal                     0                  1
3   2759427      Internal                      0                  1  
4  73570559    Surgery                        1                0

I would greatly appreciate any help

regards,

Kevin






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