  #I have 2 dataframes df1 & df2.  Each has a subset of all possible column
names.  #How do I combine the 2 tables so that they contain all column
names?   data1 <- c('2','3', '6', '8' , '9')  data2 <- c('1', '2',
'3', '6')  df1
<- data.frame(matrix(data=NA, nrow=1, ncol=length(data1),
dimnames=list(NULL, paste('col', data1, sep='') ) ) )  df2 <-
data.frame(matrix(data=data2, nrow=1, ncol=length(data2),
dimnames=list(NULL, paste('col', data2, sep='') ) ) )   e.g.  data1 <-
c('2','3', '6', '8' , '9')  data2 <- c('1', '2', '3', '6')  df1 <-
data.frame(matrix(data=NA, nrow=1, ncol=length(data1), dimnames=list(NULL,
paste('col', data1, sep='') ) ) )  df2 <- data.frame(matrix(data=data2,
nrow=1, ncol=length(data2), dimnames=list(NULL, paste('col', data2, sep='')
) ) )   #I want:  names3 <- sort( unique(c(names(df1), names(df2) ) ) )  df3
<- data.frame(matrix(data=c('1','2','3','6','8','9'), nrow=1,
ncol=length(names3), dimnames=list(NULL, names3 ) ) )

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