### Navigation

- index
- modules |
- modules |
- SciPy v0.9 Reference Guide (DRAFT) »

# scipy.maxentropy.model.crossentropy

`model.``crossentropy`(fx, log_prior_x=None, base=2.7182818284590451)

  Returns the cross entropy H(q, p) of the empirical distribution q of the data (with the given feature matrix fx) with respect to the model p. For discrete distributions this is defined as:

  > H(q, p) = - n^{-1} sum_{j=1}^n log p(x_j)

  where x_j are the data elements assumed drawn from q whose features are given by the matrix fx = {f(x_j)}, j=1,...,n.

  The ‘base’ argument specifies the base of the logarithm, which defaults to e.

  For continuous distributions this makes no sense!

### Navigation

- index
- modules |
- modules |
- SciPy v0.9 Reference Guide (DRAFT) »