'Error in UseMethod("mutate") when trying to add another column at end of numeric data set that sums rows
I get: Error in UseMethod("mutate") : no applicable method for 'mutate' applied to an object of class "c('matrix', 'array', 'double', 'numeric'
computing column wise sum
library(dplyr)
MMIp2.nona <- data.raw1.MMIp2.num %>% replace(is.na(.), 0) #works fine
MMIp2.summed <- MMIp2.nona %>% mutate(sum_of_rows = rowSums(.)) #gives error
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