VirtualVectorSource (Deedle) | Deedle

VirtualVectorSource Module

Namespace: Deedle.Vectors.Virtual
Assembly: Deedle.dll

Module that implements various helper operations over `IVirtualVectorSource` type

Types

Type	Description
ContiguousLinearAddressOperations	Linear `0 .. length-1` address ops with structural equality (needed by Combine uniqueBy).
IBoxedVectorSource<'T>	Marks IVirtualVectorSource that has been created by boxing another source
ICombinedVectorSource<'T>	Marks IVirtualVectorSource that has been created by combining another sources
ILinearAddressedSource<'T>	Marks a source reindexed onto contiguous linear addresses `0 .. Length-1`. Used by virtual `Shift`/`Diff` so absolute-address backends (partitioned Ranges) align the same way as remapping ordinal/CSV sources.
IMappedVectorSource<'T, 'R>	Marks IVirtualVectorSource that has been created by mapping from source

Functions and values

Function or value	Description
`boxSource source` Full Usage: `boxSource source` Parameters: source : `IVirtualVectorSource<'T>` Returns: `IVirtualVectorSource<obj>` Type parameters: 'T	Creates a new vector source that boxes all values The result also implements IBoxedVectorSource source : `IVirtualVectorSource<'T>` Returns: `IVirtualVectorSource<obj>`
`combine f sources` Full Usage: `combine f sources` Parameters: f : `OptionalValue<'T> list -> OptionalValue<'R>` sources : `IVirtualVectorSource<'T> list` Returns: `IVirtualVectorSource<'R>` Type parameters: 'T, 'R	Creates a new vector that combines (zips) vectors using a given function The result also implements ICombinedVectorSource f : `OptionalValue<'T> list -> OptionalValue<'R>` sources : `IVirtualVectorSource<'T> list` Returns: `IVirtualVectorSource<'R>`
`createRowReader vectorCtor builder irt vectors sources` Full Usage: `createRowReader vectorCtor builder irt vectors sources` Parameters: vectorCtor : `IVirtualVectorSource<'T> -> IVector` builder : `IVectorBuilder` irt : `IRowReaderTransform` vectors : `IVector<IVector>` sources : `IVirtualVectorSource<'T> list` Returns: `IVirtualVectorSource<IVector<obj>>` Type parameters: 'T	Creates a "row reader vector" - that is a vector that provides source for the series returned by frame.Rows. This is combined from a number of sources, but we do not fully materialize anything to create the vector. The first parameter is a ctor for `VirtualVector` which is defined below in the file. vectorCtor : `IVirtualVectorSource<'T> -> IVector` builder : `IVectorBuilder` irt : `IRowReaderTransform` vectors : `IVector<IVector>` sources : `IVirtualVectorSource<'T> list` Returns: `IVirtualVectorSource<IVector<obj>>`
`fillMissing mode source` Full Usage: `fillMissing mode source` Parameters: mode : `VectorFillMissing` source : `IVirtualVectorSource<'T>` Returns: `IVirtualVectorSource<'T>` Type parameters: 'T	Virtual FillMissing: constant fill is a map; directional fill walks neighbouring offsets on demand. Both preserve the virtual addressing scheme. mode : `VectorFillMissing` source : `IVirtualVectorSource<'T>` Returns: `IVirtualVectorSource<'T>`
`lookupValueOrScan addrOps valueAt v lookup check` Full Usage: `lookupValueOrScan addrOps valueAt v lookup check` Parameters: addrOps : `IAddressOperations` valueAt : `IVectorLocation -> OptionalValue<'V>` v : `'V` lookup : `Lookup` check : `Func<Address, bool>` Returns: `('V * Address) opt` Type parameters: 'V	Exact lookup by scanning addresses. Non-exact lookups throw `NotSupportedException`. addrOps : `IAddressOperations` valueAt : `IVectorLocation -> OptionalValue<'V>` v : `'V` lookup : `Lookup` check : `Func<Address, bool>` Returns: `('V * Address) opt`
`map rev f source` Full Usage: `map rev f source` Parameters: rev : `('TNew -> 'V) option` f : `IVectorLocation -> OptionalValue<'V> -> OptionalValue<'TNew>` source : `IVirtualVectorSource<'V>` Returns: `IVirtualVectorSource<'TNew>` Type parameters: 'TNew, 'V	Creates a new vector that transforms source values using a given function The result also implements IMappedVectorSource rev : `('TNew -> 'V) option` f : `IVectorLocation -> OptionalValue<'V> -> OptionalValue<'TNew>` source : `IVirtualVectorSource<'V>` Returns: `IVirtualVectorSource<'TNew>`
`scanLookupRange addrOps valueAt search` Full Usage: `scanLookupRange addrOps valueAt search` Parameters: addrOps : `IAddressOperations` valueAt : `IVectorLocation -> OptionalValue<'V>` search : `'V` Returns: `RangeRestriction<Address>` Type parameters: 'V	Scan every address and keep those whose `ValueAt` equals `search`. Used when a wrapper cannot reverse-map a LookupRange query to the inner source. addrOps : `IAddressOperations` valueAt : `IVectorLocation -> OptionalValue<'V>` search : `'V` Returns: `RangeRestriction<Address>`
`scanLookupRangeOf source search` Full Usage: `scanLookupRangeOf source search` Parameters: source : `IVirtualVectorSource<'V>` search : `'V` Returns: `RangeRestriction<Address>` Type parameters: 'V	Scan-based LookupRange using the source's own `ValueAt` / addressing. source : `IVirtualVectorSource<'V>` search : `'V` Returns: `RangeRestriction<Address>`
`withLinearAddressing source` Full Usage: `withLinearAddressing source` Parameters: source : `IVirtualVectorSource<'T>` Returns: `IVirtualVectorSource<'T>` Type parameters: 'T	Reindex a virtual source onto linear addresses `0L .. Length-1L`. Used after ordered `GetSubVector` / `GetRange` so absolute-address backends (partitioned Ranges) share the same address space as remapping ordinal sources. No-op when the source is already linearly addressed from 0. source : `IVirtualVectorSource<'T>` Returns: `IVirtualVectorSource<'T>`