for example I have data frame m as below:
m=as.data.frame(outer(1:5,6:9))
colnames(m)=c('a','b','c','d')
and I define the function
myf=function(df, colname){
suppose colname is a, then:
how can I get the column 'a'
and how to get the colname as a string, 'a'
}
Thank you!
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