A Federated Learning Approach to Breast Cancer Prediction in a Collaborative Learning Framework

. 2023 Dec 17;11(24):3185. doi: 10.3390/healthcare11243185

D	Dataset
∅	Missing value or special character
$\hat{D}$	Cleaned dataset
C	Categorical variable
$\hat{C}$	Encoded categorical variable
$F_{i}$	$i i$ th feature in the dataset
$\hat{F_{i}}$	Scaled feature
$D_{0}$	Instances of the majority class
$D_{1}$	Instances of the minority class
$X_{i}$	ith input feature
Y	Target variable
$Score (X_{i}, Y)$	Statistical measure for feature $X_{i}$ and target Y
S	Subset of features
$Performance (S)$	Performance measure of a model with feature subset S
X	Feature matrix
$\hat{X}$	Transformed feature matrix using PCA