Inner Join with conditions in R

Question

I want to do inner join with the condition that it should give me subtraction of 2 columns.

df1 = data.frame(Term = c(\"T1\",\"T2\",\"T3\"), Sec = c(\         


        

Answer 1

Here is a "base R" solution using the merge() function on the Term column shared by your original df1 and df2 data frames:

df_merged <- merge(df1, df2, by="Sec")
df_merged$Value <- abs(df_merged$Value.x - df_merged$Value.y)
df_merged <- df_merged[, c("Sec", "Term.x", "Value")]
names(df_merged)[2] <- "Term"

> df_merged
  Sec Term Value
1  s1   T1    30
2  s2   T2    20
3  s3   T3    10