Chris Higgins created ARROW-16871:
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Summary: calculating exp() or sqrt() on dataset field in R does
not work
Key: ARROW-16871
URL: https://issues.apache.org/jira/browse/ARROW-16871
Project: Apache Arrow
Issue Type: Bug
Components: R
Affects Versions: 8.0.0
Environment: Windows 10, R 4.2.0, RStudio 2022.02.3 Build 492
Reporter: Chris Higgins
The changeling for v8.0.0 notes that functions like exp(), log() and sqrt() can
be used in R. I have been trying to calculate exp(x) on a field in a dataset,
but this does not work. I _can_ calculate exp(10) on just some number, and I
can raise to e manually (2.71828^(x)). Here's some basic reproducible code:
```\{r}
test_df <- data.frame(x = c(1, 2, 3, 4, 5), y = c(1, 2, 3, 4, 5))
write_dataset(test_df, "./test_ds")
test_ds <- open_dataset("./test_ds")
# does not work
test_ds %>% mutate(z = exp(x)) %>% collect()
# does work
test_ds %>% mutate(z = 2.71828^(x)) %>% collect()
# also works
test_ds %>% mutate(z = exp(10)) %>% collect()
```
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