Deleting specific rows from a data frame

Question

I am working with some US govt data which has a lengthy list of cities and zip codes. After some work, the data is in the following format.

dat1 = data.frame         


        

Answer 1

I think two grepl expressions should do the trick:

> dat2[ !( grepl("City", dat2$tag) &  grepl("^\\d", dat2$keyword) ) , ]
             keyword              tag
1             Bremen       AlabamCity
2              Brent       AlabamCity
4        Chelsea, AL    AlabamaCityST
5 Bailytown, Alabama AlabamaCityState
7              54023   AlabamaZipCode
8              54024   AlabamaZipCode

You are eliminating the rows where there are digits in keyword and "City" in tag