convert rownames to column format in R

Question

I have a dataframe where the row names need to be the first column and assigned a header. I would prefer not to use any packages, just base functions in R. Hoping for a one liner.

Input:

             V1
Species1     31.76010
Species2     43.97335
Species3     40.29958

Desired output:

HeaderName   V1
Species1     31.76010
Species2     43.97335
Species3     40.29958

If that Input is a dataframe named dfrm It would just be `cbind(Header=rownames(dfrm), dfrm)` — IRTFM, Jan 27 '19 at 02:04
`df <- data.frame(names = row.names(df), df);` `rownames(df) <- NULL` — Jared Wilber, Jan 27 '19 at 02:05
How would I undue that i.e. so the column goes back to row names with header removed? — ecoevo, Jan 27 '19 at 02:48

Raymond W · Answer 1 · 2019-01-28T02:51:47.363

2

You can use this df$HeaderName <- row.names(df) to assign your row indexes to a column HeaderName

edited Jan 28 '19 at 02:51

answered Jan 27 '19 at 05:18

Raymond W

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While this might answer the authors question, it lacks some explaining words and/or links to documentation. Raw code snippets are not very helpful without some phrases around them. You may also find [how to write a good answer](https://stackoverflow.com/help/how-to-answer) very helpful. Please [edit] your answer - [From Review](https://stackoverflow.com/review/low-quality-posts/22039826) – Nick Jan 27 '19 at 06:16

convert rownames to column format in R

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