Fixing a multiple warning “unknown column”

Question

I have a persistent multiple warning of \"unknown column\" for all types of commands (e.g., str(x) to installing updates on packages), and not sure how to debug this or fix

Answer 1

I ran into this problem too except through a tibble created using a dyplyr block. Here's slight modification of sabre's code to show how I came to the same error.

library(dplyr)

df <- data.frame(id = c(1,1:3), name = c("mary", "jo", "jill","steve"))

t <- df %>%
  group_by(id) %>%
  summarize (n = n())

t
str(t)


t$newvar[t$id==1] <- 0