On Thu, May 22, 2008 at 12:29 PM, Lewis Hyatt <[EMAIL PROTECTED]> wrote:
> Hello- > > I see from this thread: > http://article.gmane.org/gmane.comp.python.numeric.general/18746/ > > that searchsorted does not work correctly with strings. Is there a > workaround, > though, that I can use with 1.0.4 until there is a new official numpy > release > that includes the fix mentioned in the reference above? Using the latest > SVN > version is not an option for me. > > My understanding was that searchsorted works OK if the strings are all the > same > data type, but that does not appear to be the case: > > p >>> x=array(['0', '1', '2', '12']) > p >>> y=array(['0', '0', '2', '3', '123']) > p >>> x.searchsorted(y) > array([0, 0, 0, 2, 0]) > p >>> x.astype(y.dtype).searchsorted(y) > array([0, 0, 2, 4, 2]) > > I understand that the first call to searchsorted fails because y has type > S3 and > x has type S2. But it seems that changing the type of x produces still > incorrect (albeit) different results. Is there something similar I can do > to > make this work for now? Thanks very much. > The x array is not sorted. Try x = array(['0', '1', '12', '2'])
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