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avoid error (#1504) 

Co-authored-by: Mine Cetinkaya-Rundel <cetinkaya.mine@gmail.com>
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Mitsuo Shiota 2023-05-27 04:44:25 +09:00 committed by GitHub
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quarto.qmd
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@ -637,12 +637,12 @@ Knitr will update the results for the cached chunk whenever it detects that one
Note that the chunks won't update if `a_very_large_file.csv` changes, because knitr caching only tracks changes within the `.qmd` file.
If you want to also track changes to that file you can use the `cache.extra` option.
This is an arbitrary R expression that will invalidate the cache whenever it changes.
A good function to use is `file.info()`: it returns a bunch of information about the file including when it was last modified.
A good function to use is `file.mtime()`: it returns when it was last modified.
Then you can write:
``` {{r}}
#| label: raw-data
#| cache.extra: file.info("a_very_large_file.csv")
#| cache.extra: !expr file.mtime("a_very_large_file.csv")
rawdata <- readr::read_csv("a_very_large_file.csv")
```