dtree
DTREE constructor
Description
Examples
Create DTREE
Object
Create a tree of order 2 and depth 3.
x = 1:10; t = dtree(2,3,x)
Data Tree Object Structure =============================== Size of initial data :[1 10] Order :2 Depth :3 Terminal nodes :[7 8 9 10 11 12 13 14] ------------------------------------------
Use nodejoin
to recompose the second node.
t = nodejoin(t,2)
Data Tree Object Structure =============================== Size of initial data :[1 10] Order :2 Depth :3 Terminal nodes :[7 8 9 10 2] ------------------------------------------
Input Arguments
ord
— Order of the tree
2
(default) | integer ≥ 2
Order of the tree, specified as an integer greater than or equal to 2.
Data Types: double
d
— Depth of the tree
0
(default) | nonnegative integer
Depth of the tree, specified as a nonnegative integer.
Data Types: double
x
— Data
vector | matrix
Data, specified as a vector or matrix.
Data Types: double
u
— User data
{}
(default) | array | cell array | structure array
User data to set in the ud
field of
T
, specified as an array, cell array, or structure
array.
Example:
t = dtree(2,3,[0 1],{1,"aa",rand(3,3)})
Name-Value Arguments
Specify optional pairs of arguments as
Name1=Value1,...,NameN=ValueN
, where Name
is
the argument name and Value
is the corresponding value.
Name-value arguments must appear after other arguments, but the order of the
pairs does not matter.
Example: t = dtree(order=2,depth=3)
specifies a tree of depth 3
and order 2.
Before R2021a, use commas to separate each name and value, and enclose
Name
in quotes.
Example: t = dtree("order",2,"depth",3)
specifies a tree of
depth 3 and order 2.
order
— Order of the tree
2
(default) | integer ≥ 2
Order of the tree, specified as an integer greater than or equal to 2.
depth
— Depth of the tree
0
(default) | nonnegative integer
Depth of the tree, specified as nonnegative integer.
data
— Data associated to the tree
vector | matrix
Data associated to the tree, specified as a vector or matrix.
spsch
— Split scheme for nodes
logical array
Split scheme for nodes, specified as an ord
-by-1
logical array.
The root of the tree can be split and it has ord
children. If spsch(j) = 1
, you can
split the jth child. Each node that you can split has
the same property as the root node.
ud
— User data field
{}
(default) | array | cell array | structure array
User data to set in the ud
field of
T
, specified as an array, cell array, or
structure array.
Output Arguments
T
— Tree
DTREE
object
Tree, returned as a DTREE
object. The tree has these
fields:
dtree | Parent object |
allNI | All nodes information |
terNI | Terminal nodes information |
For more information on object fields, type:
help dtree/get
nb
— Number of terminal nodes
integer
Number of terminal nodes (leaves) of T
.
Data Types: double
Version History
Introduced before R2006a
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