rename invnorm to invgauss (Trac #1172)

[scipy-gitbot]

Original ticket http://projects.scipy.org/scipy/ticket/1172 on 2010-05-10 by @josef-pkt, assigned to unknown.

reported by Matthew Brett

invnorm is a confusing name for the distribution, in the literature it is mostly called the Inverse Gaussian, or for some parameterization Wald, np.random uses Wald

see thread at http://mail.scipy.org/pipermail/scipy-user/2010-April/025003.html

proposal:
depreciate name invnorm and replace it with invgauss

How can we depreciate a class and a class instance?

Docstring can have a warning text, but I don't see where we can raise a warning.

[scipy-gitbot]

@rgommers wrote on 2010-11-13

For 0.8.0 we had a discussion about deprecating a class, and settled on decorating the __init__ method with @deprecate. If an instance is created in the code, that's more of a problem maybe. You don't want to issue a warning on import of the module, only when the instance is used, right? One can decorate all implemented methods (_rvs, _pdf, _cdf, _stats) but that still doesn't cover it all. But that plus adding it to the docstring is perhaps the best you can do.

[scipy-gitbot]

@rgommers wrote on 2010-11-28

Added invgauss and deprecated invnorm in rgommers@4776ec7

[scipy-gitbot]

@rgommers wrote on 2010-11-28

Committed in 505ee61.