Subscript & Indexing Errors

Cannot subset non-existent columns

Matches: Can't subset columns that don't exist

WHAT THIS ERROR MEANS

You tried to select or access columns that don't exist in the data frame. This is the tidyverse equivalent of 'undefined columns selected'.

1. Check available columns with names(df).

2. Look for typos in column names.

3. Verify the column wasn't removed in a prior step.

BAD — THIS CAUSES THE ERROR

df %>% select(revnue, date)  # typo in revenue

GOOD — CORRECT APPROACH

df %>% select(revenue, date)

Paste your code in RChat and the AI will fix this error in context.