Description Usage Arguments Details Value See Also Examples
Function to oversample by SMOTE the minority class
1 |
data |
data frame or matrix of data including only the minority class. Rows: examples; columns: features |
fp |
multiplicative factor for the SMOTE oversampling of the minority class (def=1). If fp<1 no oversampling is performed. |
k |
number of the nearest neighbours for SMOTE oversampling (def. 5) |
If n is the number of examples of the minority class, then fp*n new synthetic examples are generated according to the SMOTE algorithm and returned in addition to the original set of positives. If fp<1 no new data are generated and the original data set is returned
a data frame including the original minority class examples plus the SMOTE oversampled data
1 2 | d <- imbalanced.data.generator(n.pos=20, n.neg=1000, n.features=12, n.inf.features=2, sd=1, seed=1);
res <- smote(d$data[d$label==1,], fp = 2, k = 3);
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