Enum DataSource 

#[non_exhaustive]
pub enum DataSource {
    InMemory(Vec<Vec<f64>>),
    Csv(String),
    Parquet(String),
    Directory(String),
}

Origin of data for a NewStreamingIterator.

This enum is #[non_exhaustive] so that future sources (e.g. Arrow IPC, HDF5) can be added without breaking existing match arms.

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

InMemory(Vec<Vec<f64>>)

All rows are already in memory as a Vec<Vec<f64>>.

Each inner Vec<f64> is one row; all rows must have the same length.

Csv(String)

Path to a CSV file (first row treated as a header and skipped).

All remaining columns except the last are treated as features; the last column is treated as a label.

Parquet(String)

Path to a Parquet file (requires formats feature via scirs2-io).

Currently falls back to an unsupported error unless the formats feature is enabled.

Directory(String)

Path to a directory. Every file in the directory is read as a CSV (same convention as DataSource::Csv).

Trait Implementations

impl Debug for DataSource

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.