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Add warning to users about lack of support for Not, Between, and All #151

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Sep 11, 2020
Merged

Add warning to users about lack of support for Not, Between, and All #151

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Add warning to users
pdeffebach Jun 13, 2020
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Update README.md
pdeffebach Jun 13, 2020
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Merge branch 'master' into docs_Not
nalimilan Sep 11, 2020
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7 changes: 7 additions & 0 deletions README.md
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Expand Up @@ -79,6 +79,13 @@ Add additional columns based on keyword arguments.
@transform(df, newCol = cos.(:x), anotherCol = :x.^2 + 3*:x .+ 4)
```

!!! note

Versions of DataFrames.jl `0.19` and above support the operators `Between`, `All`,
and `Not` when selecting and transforming columns. DataFramesMeta.jl does not currently
support this syntax.


## `@byrow!`

Act on a DataFrame row-by-row. Includes support for control flow and `begin end` blocks. Since the "environment" induced by `@byrow! df` is implicitly a single row of `df`, one uses regular operators and comparisons instead of their elementwise counterparts as in `@with`.
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