*Bottom Line: How can I compare the individual components of two data frames
with different row lengths without the levels interfering?*
Example: I have two data frames to those respectively named 'dfCity' and
'dfState' that have the following output:
dfCity
Name City
1 Bill Detroit
2 Jody Chicago
3 Frank Memphis
4 Ron Houston
dfState
Name State
1 Bill Michigan
2 Frank Tennessee
I have an if statement that is trying to compare the individual's names and
combine the data from the two different data frames to produce some output:
for(j in 1:length(row.names(dfState))){
for(k in 1:length(row.names(dfCity))){
if(dfCity[k,1] == dfState[j,1]){
cityState <- paste(dfCity[k,2], ", ",
dfState[j,2], sep= "")
print(dfCity[1, j], " is from ",
cityState)
}
}
}
However, when I run it I get the error /Error in Ops.factor(dfState[2, 1],
dfCity[4, 1]) : level sets of factors are different/ due to the levels in
the data frames. *How can I compare the individual components of the data
frame without the levels interfering? *
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