Struct agnes::store::DataStore

pub struct DataStore {
    pub fields: Vec<DsField>,
    pub field_map: HashMap<FieldIdent, usize>,
    // some fields omitted
}

Data storage underlying a dataframe. Data is retrievable both by index (of the fields vector) and by field name.

Fields

fields: Vec<DsField>

List of fields within the data store

field_map: HashMap<FieldIdent, usize>

Map of field names to index of the fields vector

Methods

impl DataStore

pub fn empty() -> DataStore

Generate and return an empty data store

pub fn with_fields(fields: Vec<TypedFieldIdent>) -> DataStore

Create a new DataStore which will contain the provided fields.

pub fn with_data<FI, U, S, T, B, F>(
    unsigned: U,
    signed: S,
    text: T,
    boolean: B,
    float: F
) -> DataStore where
    FI: Into<FieldIdent>,
    U: Into<Option<Vec<(FI, MaskedData<u64>)>>>,
    S: Into<Option<Vec<(FI, MaskedData<i64>)>>>,
    T: Into<Option<Vec<(FI, MaskedData<String>)>>>,
    B: Into<Option<Vec<(FI, MaskedData<bool>)>>>,
    F: Into<Option<Vec<(FI, MaskedData<f64>)>>>, 

Create a new DataStore with provided data. Data is provided in type-specific vectors of field identifiers along with data for the identifier.

NOTE: This function provides no protection against field name collisions.

pub fn insert(
    &mut self,
    ty_ident: TypedFieldIdent,
    value_str: String
) -> Result<()>

Insert a value (provided in unparsed string form) for specified field

pub fn has_field(&self, ident: &FieldIdent) -> bool

Returns true if this DataStore contains this field.

pub fn get_field_type(&self, ident: &FieldIdent) -> Option<FieldType>

Get the field information struct for a given field name

pub fn fields(&self) -> Vec<&TypedFieldIdent>

Get the list of field information structs for this data store

pub fn fieldnames(&self) -> Vec<String>

Get the field names in this data store

pub fn is_homogeneous(&self) -> bool

Check if datastore is "homogenous": all columns (regardless of field type) are the same length

pub fn nrows(&self) -> usize

Retrieve number of rows for this data store

Trait Implementations

impl Debug for DataStore

fn fmt(&self, __arg_0: &mut Formatter) -> Result

Formats the value using the given formatter.

impl Clone for DataStore

fn clone(&self) -> DataStore

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Default for DataStore

fn default() -> DataStore

Returns the "default value" for a type.

impl<'a> ApplyToElem<FieldIndexSelector<'a>> for DataStore

fn apply_to_elem<F: ElemFn>(
    &self,
    f: F,
    select: FieldIndexSelector
) -> Result<F::Output>

Apply an ElemFn to an element selected with the provided Selector.

impl<'a> ApplyToField<FieldSelector<'a>> for DataStore

fn apply_to_field<F: FieldFn>(
    &self,
    f: F,
    select: FieldSelector
) -> Result<F::Output>

Apply a FieldFn to a field selected with the provided Selector.

impl AddData<u64> for DataStore

fn add(&mut self, ident: FieldIdent, value: MaybeNa<u64>)

Add a single value to the specified field.

impl AddData<i64> for DataStore

fn add(&mut self, ident: FieldIdent, value: MaybeNa<i64>)

Add a single value to the specified field.

impl AddData<String> for DataStore

fn add(&mut self, ident: FieldIdent, value: MaybeNa<String>)

Add a single value to the specified field.

impl AddData<bool> for DataStore

fn add(&mut self, ident: FieldIdent, value: MaybeNa<bool>)

Add a single value to the specified field.

impl AddData<f64> for DataStore

fn add(&mut self, ident: FieldIdent, value: MaybeNa<f64>)

Add a single value to the specified field.

impl From<DataStore> for DataView

fn from(store: DataStore) -> DataView

Performs the conversion.

impl From<DataStore> for DataFrame

fn from(store: DataStore) -> DataFrame

Performs the conversion.