Trying to rename columns in R

library(tidyverse)
library(data.table)

ugriz <- read.table("QSOs_1st_50k.dat-mags.dat")
ugriz <- data.frame(ugriz)
fields = c('name', 'z','delta_z','NED_class','SDSS_class','no_radio','radio_max','no_UV', 'UV_min',
          'u', 'g', 'r', 'i', 'z_mag', 'I', 'J', 'H', 'K', 'W1', 'SPIT_5',
          'W2', 'SPIT_8', 'W3', 'W4', 'NUV', 'FUV')

rename(ugriz, ned = V1, redshift = V2) # this works fine

# attempt 1 (tried with and without the quotes):
rename(ugriz, c('name', 'z', 'delta_z', 'NED_class', 'SDSS_class', 'no_radio', 'radio_max', 'no_UV', 'UV_min',
                'u','g','r','i','z_mag','I','J','H','K', 'W1', 'SPIT_5',
                'W2','SPIT_8', 'W3', 'W4', 'NUV', 'FUV'), c('V1':'V26'))
# attempt 2:
setnames(ugriz, old = c('V1':'V26'), new = fields)