Struct combee::dataframe::DataFrame

pub struct DataFrame<D: Clone + DeserializeOwned + Serialize> { /* private fields */ }

A DataFrame is the main data structure of combee.

Implementations

impl<D: Clone + DeserializeOwned + Serialize> DataFrame<D>

pub fn new(data: Vec<D>) -> Self

Instatiante a new DataFrame.

pub fn take(&self, num: usize) -> Vec<D>

Returns a vector with the first ‘num’ rows of this DataFrame.

pub fn head(&self, num: usize) -> SliceDataFrame<'_, D>

Returns a new DataFrame with the first ‘num’ rows of this DataFrame.

pub fn len(&self) -> usize

Return the number of rows of the DataFrame.

pub fn apply<S: Clone + DeserializeOwned + Serialize, F>( &self, func: F ) -> DataFrame<S>where F: Fn(&D) -> S,

Apply a function for each row of a DataFrame and returns a new DataFrame.

pub fn filter<F>(&self, func: F) -> Selfwhere F: Fn(&D) -> bool,

Filter the DataFrame with the condition given by the closure parameter.

pub fn sort<F>(&self, comp: F) -> Selfwhere F: Fn(&D, &D) -> bool,

Sort the DataFrame by a comparison function and returns a new DataFrame sorted. This sorting algorithm is not stable, i.e, does not preserve the order of equal elements.

pub fn groupby<F, I: Eq + Hash + Clone>( &self, index: F ) -> GroupedDataFrame<'_, D, I, F>where F: Fn(&D) -> I,

Group DataFrame by index function.

pub fn find<F>(&self, condition: F) -> Option<&D>where F: Fn(&D) -> bool,

Find a row in the dataframe given a condition.

pub fn to_csv(&self, path: String) -> Result<(), Error>

Save a DataFrame as a CSV file.

pub fn to_parquet(&self, path: String) -> Result<(), Error>

Save a DataFrame as a Parquet file.