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name_r
2009 May 01
1
Problems with 'valid columns' when using merge
...be valid:
> colnames(arun_1986)
[1] "Latitude" "Longitude" "Sim_1986"
> colnames(fekete_1986)
[1] "Latitude" "Longitude" "X1986"
I'm trying to merge based on both the Latitude and Longitude column and have used by=c("name_x", "name_y") before without too many problems. Any suggestions would be gratefully received.
Many thanks,
Steve