amueller/scikit-learn — comment on commit 658897497399147a78fad5f7001fc62dd1e487ed
File: sklearn/svm/base.py line 153
By mblondel:

So now thanks to this change, `coef_` has the same shape as `decision_function`. Good !

Is it ok to break API or shall we introduce a temporary property (say `ovo_coef_`) and rename it to `coef_` in two releases? Note that `coef_` hasn't the same shape in other estimators, since they are based on OneVsRest...

If understand it correctly, the old `coef_` is some kind of way to convert the OneVsOne model to a OneVsRest model (by factorizing the alphas). There may even be a way to get `n_classes` rows instead of `n_classes-1`.