On Wed, Sep 15, 2010 at 1:34 PM, Benjamin Root <[email protected]> wrote:
> Hello, > > I am trying to solve a problem in matplotlib where I would have an array of > floating point numbers and I want to quickly determine what is the closest > common offset to a power of 10. In other words, if given: > > [12373.43, 12375.89, 12370.18], > > I would want returned something like either 12370.0, or the lowest common > order of magnitude (in this case, 10). > > Is there some sort of neat math/numpy trick to figure this out? I already > have a brute-force method with a while loop, but I am looking for something > a little bit more elegant. > > Something along the lines of In [14]: ceil(log10(a.max() - a.min())) Out[14]: 1.0 ? I think this approach can be fixed up for whatever it is. I wasn't clear on that. Chuck
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