How do you vertically concatenate two Polars data frames in Rust?

Darnock 0
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According to the Polars documentation, in Python, you can vertically concatenate two data frames using the procedure shown in the below code snippet:

df_v1 = pl.DataFrame(
    {
        "a": [1],
        "b": [3],
    }
)
df_v2 = pl.DataFrame(
    {
        "a": [2],
        "b": [4],
    }
)
df_vertical_concat = pl.concat(
    [
        df_v1,
        df_v2,
    ],
    how="vertical",
)
print(df_vertical_concat)

The output of the above code is:

shape: (2, 2)
┌─────┬─────┐
│ a   ┆ b   │
│ --- ┆ --- │
│ i64 ┆ i64 │
╞═════╪═════╡
│ 1   ┆ 3   │
├╌╌╌╌╌┼╌╌╌╌╌┤
│ 2   ┆ 4   │
└─────┴─────┘

How do you perform the same operation in Rust?

rust-polars rust
1 Answers

You can do it as follows:

let df_vertical_concat = df_v1.vstack(&df_v2).unwrap();
Darnock0
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