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2009 Jul 22
1
Problem with "merge" command duplicating values
...lues in the merged set and I have no idea why. I've not had this problem with merge in the past.... any thoughts? To illustrate: given the following objects (as data frames) with 1 unique and 10 common variables: h2_flasks co2c13_flasks co2o18_flasks ch4_flasks co2_flasks co_flasks n2o_flasks co2c14_flasks #Merge objects into one data frame ("grand merge"): >obj.list <- ls(pattern='flasks') >grand.merge<-merge(get(obj.list[1]),get(obj.list[2]),all=TRUE) >for (ss in 3:length(obj.list)){ grand.merge<-merge(grand.merge,get(obj.list[ss]),all=TRUE) } #CH4 dat...