Thank you sir........... thank you very much.............
On Wed, Apr 6, 2011 at 9:36 PM, Christopher Barker <[email protected]>wrote: > On 4/6/11 6:24 AM, Alan G Isaac wrote: > > http://docs.scipy.org/doc/numpy/reference/generated/numpy.round_.html > > simple enough, of course, but just to be clear: > > In [108]: np.round(1.23456789, 3) > Out[108]: 1.2350000000000001 > > so the number is rounded to the requested number of decimal places, but > then stored in a binary floating point format, which may not be able to > exactly represent that rounded number -- hence the "1" at the end. This > is simply how floating point works. > > and that slight difference _probably_ doesn't matter, but it's worth > being aware of, because is does make a difference occasionally. > > python has a decimal type that can work with exact decimal numbers -- > numpy doesn't support that, as there is no hardware support for it (at > least on most platforms). > > If you want to display it differently, you can use the string formatters: > > In [110]: "%.3f"%np.round(1.23456789, 3) > Out[110]: '1.235' > > HTH, Chris > > > -- > Christopher Barker, Ph.D. > Oceanographer > > Emergency Response Division > NOAA/NOS/OR&R (206) 526-6959 voice > 7600 Sand Point Way NE (206) 526-6329 fax > Seattle, WA 98115 (206) 526-6317 main reception > > [email protected] > _______________________________________________ > NumPy-Discussion mailing list > [email protected] > http://mail.scipy.org/mailman/listinfo/numpy-discussion > -- DILEEPKUMAR. R J R F, IIT DELHI
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