Incorrect documented output shape for predict method of linear models when n_targets > 1

[hchau630]

Describe the issue linked to the documentation

For some classes under sklearn.linear_model such as LinearRegression, Ridge, RidgeCV, and a bunch of others, the documentation for the predict method states that it returns

C : array, shape (n_samples,)
            Returns predicted values.

However, this is incorrect when the model is fitted with y with shape (n_samples, n_targets), i.e. n_targets > 1, in which case the returned array should have shape (n_samples, n_targets).

Suggest a potential alternative/fix

The documentation for the return value of the predict method should be

C : array, shape (n_samples,) or (n_samples, n_targets)
            Returns predicted values.

[glemaitre]

Indeed, it should be fixed. Thanks for noticing @hchau630. Do you wish to make a pull-request to address this problem?

[hchau630]

Sure, should be a quick fix.