CODEWITHSUNDEEP
r
Joschi
Joschi

Reputation: 3039

Order a dataframe with columname indexed as colnumber

I can easily order a dataframe like this:

df<-data.frame(a=c(1,2,5,7,2),b=(1:5))
# indexing by column name, works
df2<-df[with(df,order(a)),]

But how can I achive the same by indexing with the column number?

# indexing with column number, attemps failed
df2<-df[with(df,order(colnames(df[1]))),]
df2<-df[with(df,order(deparse(colnames(df[1])))),]
df2<-df[with(df,order(paste(colnames(df[1])))),]
df2<-df[with(df,order(paste(deparse(colnames(df[1]))))),]

Upvotes: 1

Views: 104

Answers (1)

juba
juba

Reputation: 49033

Like this ?

df2 <- df[order(df[,1]),]

If you use with you won't be able to use column numbers.

Upvotes: 1

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