error in adding the first column as the row name in r -


i'm trying name row names first column in r. error invalid 'row.names' length present.

df

   x1     b 1     2   1 2  b    4   2

expected output

        b    2    1 b    4    2

my code

df1 <- df[, -1] #remove first column x1 , create new df->df1 rownames(df1) <- df[, 1] #add row names first column of df

error

error in `row.names<-.data.frame`(`*tmp*`, value = value) : invalid 'row.names' length

thanks!

to complete first answer, can suggest also:

library(magrittr) df %>% data.frame %>% set_rownames(.$x1) %>% select(-x1)

or

library(tibble) data.frame(column_to_rownames(df, var = "x1"))

eventually, understand why initial data.frame gave error in setting row.names, because of subsetting. you'll see not vector:

    dim(df[, 1])  #### [1] 2 1

it's due particularities of tibble format of initial data.frame. @thelatemail help.


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