add_column fails with only data of length 1

[MikeBadescu]

From the documentation:

This works

df <- tibble(x = 1:3, y = 3:1)
add_column(df, z = -1:1, w = 0)

This does not work ("Error: Expected 3 rows, got 1")

df <- tibble(x = 1:3, y = 3:1)
add_column(df, w = 0)

[anhqle]

This is caused here in add.R

When both z and w are specified, the tibble to-be-added has 3 rows. In contrst, when only w is specified, the tibble to be added only has 1 row, and thus cannot be added to the original tibble.

add_column <- function(.data, ..., .before = NULL, .after = NULL) {
  df <- tibble(...)

  if (nrow(df) != nrow(.data)) {
    stopc("Expected ", nrow(.data), " rows, got ", nrow(df))
}

@krlmlr Seems like solution is for add_column() to check whether one column is being added. If yes, expand the new tibble to have the same rows as the original tibble. Any thoughts?

[krlmlr]

@LaDilettante: The following should work, too:

add_column(iris, a = 1, b = 2)

However, the code below still should give an error:

add_column(iris, a = 1:2)

[MikeBadescu]

Thank you!

[hbeale]

I've updated my tidyverse and I still encounter this issue.

> packageVersion("tibble")
[1] ‘1.3.4’
> tibble(cars) %>% add_column(newCol="sfdsdfs")
Error: Each variable must be a 1d atomic vector or list.
Problem variables: 'cars'

[anhqle]

@hbeale Your error is in the tibble(cars) part, not in the add_column() part.

Use as_tibble(cars) %>% add_column(newCol="sfdsdfs")

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