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Use once singluar (#1587)

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Yvonne Fröhlich
2023-10-25 22:06:23 +02:00
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@@ -498,7 +498,7 @@ A good way of familiarizing yourself with the coding style used in a new package
4. Recreate the `bake_sale` data frame, write it out to an Excel file using the `write.xlsx()` function from the openxlsx package.
5. In @sec-data-import you learned about the `janitor::clean_names()` function to turn columns names into snake case.
5. In @sec-data-import you learned about the `janitor::clean_names()` function to turn column names into snake case.
Read the `students.xlsx` file that we introduced earlier in this section and use this function to "clean" the column names.
6. What happens if you try to read in a file with `.xlsx` extension with `read_xls()`?