Sin licencia
Chun Zheng
Entropy is used to help create an optimized decision tree. I created an entropy function called getBestEnt so that given the information it has received, it will return the highest information gain and the index of the best feature to use for the decision tree.
Here's an example:
hair=[1 1 2 3 2 2 2 1];
entropyF(class,hair)
ans =
0.5000
eyes=[1 1 1 1 2 1 2 2];
entropyF(class,eyes)
ans =
0.6068
height=[1 2 1 1 1 2 2 1];
entropyF(class,height)
ans =
0.9512
entropy(class)
ans =
0.9544
allFeat=[eyes hair height];
[big ind]=getBestEnt(class, allFeat)
big =
0.9544
ind
1
note: big stands for best information gain
The ind determines the 1nd feature(eyes) as the best feature
Citar como
Chun Zheng (2024). Entropy (https://www.mathworks.com/matlabcentral/fileexchange/14996-entropy), MATLAB Central File Exchange. Recuperado .
Compatibilidad con la versión de MATLAB
Compatibilidad con las plataformas
Windows macOS LinuxCategorías
Etiquetas
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!Descubra Live Editor
Cree scripts con código, salida y texto formateado en un documento ejecutable.
Versión | Publicado | Notas de la versión | |
---|---|---|---|
1.0.0.0 |