Handbook
Glossary
subsets-weighted-entropy ( data-target idx -- seq )
Vocabulary
machine-learning
.
decision-trees
Inputs
data-target
an
object
idx
an
object
Outputs
seq
an
object
Definition
USING:
assocs
kernel
math
sequences
;
IN:
machine-learning.decision-trees
:
subsets-weighted-entropy
( data-target idx -- seq )
'[
first
_
swap
nth
]
group-by-sorted
'[
[
second
]
map
]
assoc-map
values
[
[
entropy2
]
[
length
]
bi
*
]
map-sum
;
inline