Hi

is there a way in R to create a new column vector with the numbers of 2 others columns simply appended?

Example : I have a column with provinces codes (1 to 19)
I have a second column with districts codes (1 to ##, depending on the province)
I want to create a third column with a code that would be unique for each district:

Province  District   District_Unique
1             1            11
1             2            12
13           2            132

I can create a loop, but it becomes complicated with numerous data

Thanks for your help




      
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