最終更新日：2025/11/28
(statistics) A directed acyclic graph whose vertices represent random variables and whose directed edges represent conditional dependencies. Each random variable can fall into any of at least two mutually disjoint states, and has a probability function which takes as inputs the states of its parent nodes and returns as output the probability of being in a certain state for a given combination of the states of its parent nodes. A node without parent nodes just has an unconditioned probability of being in some given state.
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Bayesian network
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元となった辞書の項目
Bayesian network
IPA（発音記号）
名詞
(statistics)
A
directed
acyclic
graph
whose
vertices
represent
random
variables
and
whose
directed
edges
represent
conditional
dependencies.
Each
random
variable
can
fall
into
any
of
at
least
two
mutually
disjoint
states,
and
has
a
probability
function
which
takes
as
inputs
the
states
of
its
parent
nodes
and
returns
as
output
the
probability
of
being
in
a
certain
state
for
a
given
combination
of
the
states
of
its
parent
nodes.
A
node
without
parent
nodes
just
has
an
unconditioned
probability
of
being
in
some
given
state.
日本語の意味
ベイズネットワークとは、各頂点が確率変数を表す有向非巡回グラフであり、各辺が条件付き依存性を示す統計的モデルです。 / 各確率変数は、少なくとも2つ以上の互いに排反する状態を取り、親ノードの状態に基づいて、その特定の状態にある確率が決定されます。 / 親ノードを持たないノードは、外部の条件に依存しない、純粋な確率（無条件確率）を持ちます。
意味（1）
(statistics)
A
directed
acyclic
graph
whose
vertices
represent
random
variables
and
whose
directed
edges
represent
conditional
dependencies.
Each
random
variable
can
fall
into
any
of
at
least
two
mutually
disjoint
states,
and
has
a
probability
function
which
takes
as
inputs
the
states
of
its
parent
nodes
and
returns
as
output
the
probability
of
being
in
a
certain
state
for
a
given
combination
of
the
states
of
its
parent
nodes.
A
node
without
parent
nodes
just
has
an
unconditioned
probability
of
being
in
some
given
state.
（ plural ）
