Assign random values to column according to another column's values in R

Question

I have a dataset that has Stock Codes with the range from 2-90214 (which has around 3000 unique values). Obviously, some values between 2 and 90214 are getting skipped. I want t

Answer 1

We can use match to get the index of the unique values, and then add 99

df1$Stock_Code <- match(df1$Stock_Code, unique(df1$Stock_Code)) + 99
df1$Stock_Code
[1] 100 101 102 100 101

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Or another option is to convert to factor and coerce to integer

with(df1, as.integer(factor(Stock_Code, levels = unique(Stock_Code)))+ 99)
#[1] 100 101 102 100 101