[SciPy-user] use of rv_continuous "fit"?
Travis Oliphant
oliphant at ee.byu.edu
Mon Aug 29 13:13:58 CDT 2005
lindeman at bard.edu wrote:
>Evidently I haven't grasped the Zen of SciPy's rv_continuous classes. I am
>trying to compose a simple snippet of code that would fit a normal curve to a
>vector of data (say, [-2.0, -1.0, -0.5, 0.0, 0.5, 1.0, 2.0]) -- which .fit seems
>that it ought to do, with about three lines of code, but I can't figure out the
>three lines. And I can't seem to find a single use of .fit anywhere on the Web.
>Sigh. Could someone please rescue the newbie?
>
>
The idea is that this should be simple, but the .fit method has not been
tested extensively. With that caveat, I'm not sure I understand what
you mean about fitting a normal curve to your vector of "data."
What exactly are you trying to do here? Are you fitting a function to a
normal curve? or are you estimating the parameters of the normal
distribution using data which represents samples drawn from a normal
distribution.
The .fit method is for the latter. Use something in optimize (i.e.
optimize.leastsq) for the former.
-Travis O.
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