egutierrez
fc734029c1
12 funciones puras con implementación real: Standardize, MinMaxScale, Clip, RollingWindow, ZipSlices, GroupBy, Histogram, Pearson, Autocorrelation, FFT (Cooley-Tukey), DetectOutliers, Impute 3 funciones impuras (stubs): LoadCSV, LoadParquet, FetchDataFrame Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
12 lines
294 B
Go
12 lines
294 B
Go
package datascience
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// GroupBy agrupa los elementos de un slice según la clave devuelta por keyFn.
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func GroupBy[T any, K comparable](xs []T, keyFn func(T) K) map[K][]T {
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groups := make(map[K][]T)
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for _, x := range xs {
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k := keyFn(x)
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groups[k] = append(groups[k], x)
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}
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return groups
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}
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