scipy/scipy — pull request #3736 by ev-br (2014-06-15 20:45:46+00:00)
Title: BUG: cast pchip arguments to floats

As noted in https://github.com/scipy/scipy/issues/3453#issuecomment-45812768, `pchip` interpolator goes nuts when given integer input. This PR makes sure the arguments are cast to floats.