NearestNeighbour1D¶

class
NearestNeighbour1D
(*args)¶ Partition tree data structure for 1D points.
Allows to store and search 1D points fast, by using dichotomy on sorted points.
Parameters:  sample :
Sample
1D points
See also
Examples
>>> import openturns as ot >>> myRegularGrid = ot.RegularGrid(0.0, 0.1, 100) >>> tree = ot.NearestNeighbour1D([[x] for x in myRegularGrid.getValues()]) >>> neighbour = tree.queryScalar(0.1)
Methods
getClassName
()Accessor to the object’s name. getId
()Accessor to the object’s id. getName
()Accessor to the object’s name. getSample
()Get the points which have been used to build this nearest neighbour algorithm. getShadowedId
()Accessor to the object’s shadowed id. getVisibility
()Accessor to the object’s visibility state. hasName
()Test if the object is named. hasVisibleName
()Test if the object has a distinguishable name. query
(*args)Get the index of the nearest neighbour of the given point. queryK
(x, k[, sorted])Get the indices of nearest neighbours of the given point. queryScalar
(*args)Accessor to the nearest neighbour index. queryScalarK
(x, k[, sorted])Accessor to the nearest neighbours indices. setName
(name)Accessor to the object’s name. setSample
(sample)Build a NearestNeighbourAlgorithm from these points. setShadowedId
(id)Accessor to the object’s shadowed id. setVisibility
(visible)Accessor to the object’s visibility state. 
__init__
(*args)¶ Initialize self. See help(type(self)) for accurate signature.

getClassName
()¶ Accessor to the object’s name.
Returns:  class_name : str
The object class name (object.__class__.__name__).

getId
()¶ Accessor to the object’s id.
Returns:  id : int
Internal unique identifier.

getName
()¶ Accessor to the object’s name.
Returns:  name : str
The name of the object.

getSample
()¶ Get the points which have been used to build this nearest neighbour algorithm.
Returns:  sample :
Sample
Input points.
 sample :

getShadowedId
()¶ Accessor to the object’s shadowed id.
Returns:  id : int
Internal unique identifier.

getVisibility
()¶ Accessor to the object’s visibility state.
Returns:  visible : bool
Visibility flag.

hasName
()¶ Test if the object is named.
Returns:  hasName : bool
True if the name is not empty.

hasVisibleName
()¶ Test if the object has a distinguishable name.
Returns:  hasVisibleName : bool
True if the name is not empty and not the default one.

query
(*args)¶ Get the index of the nearest neighbour of the given point.
 Available usages:
query(point)
query(sample)
Parameters:  point : sequence of float
Given point.
 sample : 2d sequence of float
Given points.
Returns:  index : int
Index of the nearest neighbour of the given point.
 indices :
openturns.Indices
Index of the nearest neighbour of the given points.

queryK
(x, k, sorted=False)¶ Get the indices of nearest neighbours of the given point.
Parameters:  x : sequence of float
Given point.
 k : int
Number of indices to return.
 sorted : bool, optional
Boolean to tell whether returned indices are sorted according to the distance to the given point.
Returns:  indices : sequence of int
Indices of the k nearest neighbours of the given point.

queryScalar
(*args)¶ Accessor to the nearest neighbour index.
 Available usages:
queryScalar(x)
queryScalar(point)
Parameters:  x : float
Given 1D point.
 point : sequence of float
Sequence of 1D points.
Returns:  index : int
Index of the nearest neighbour.
 indices :
openturns.Indices
Index of the nearest neighbour of the given points.

queryScalarK
(x, k, sorted=False)¶ Accessor to the nearest neighbours indices.
Parameters:  x : float
Given 1D point.
 k : int
Number of indices to return.
 sorted : bool
Boolean to tell whether returned indices are sorted according to the distance to the given point.
Returns:  indices :
Indices
Indices of the k nearest neighbours.

setName
(name)¶ Accessor to the object’s name.
Parameters:  name : str
The name of the object.

setSample
(sample)¶ Build a NearestNeighbourAlgorithm from these points.
Parameters:  sample :
Sample
Input points.
 sample :

setShadowedId
(id)¶ Accessor to the object’s shadowed id.
Parameters:  id : int
Internal unique identifier.

setVisibility
(visible)¶ Accessor to the object’s visibility state.
Parameters:  visible : bool
Visibility flag.
 sample :