Fused Lasso is a regularized regression method that extends the Lasso by imposing sparsity on both the coefficients and their successive differences, thereby encouraging piecewise constant solutions in high-dimensional data.
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Pathwise coordinate optimization
Jerome H. Friedman, Trevor Hastie, Holger Höfling et al. · The Annals of Applied Statistics · 2007 · 1.9K citations · Full text
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