In [1]: intArr1 = numpy.array([ 0, 1, 2,-2,-1, 5,-5,-5]) In [2]: intArr2 = numpy.array([1,1,1,2,2,2,3,4]) In [3]: charArr = numpy.array(['a','a','a','b','b','b','c','d'])
Here I sort two int arrays. As expected intArr2 dominates intArr1 but the items with the same intArr2 values are sorted forwards according to intArr1 In [6]: numpy.lexsort((intArr1, intArr2)) Out[6]: array([0, 1, 2, 3, 4, 5, 6, 7]) This, however, looks like a bug to me. Here I sort an int array and a str array. As expected charArray dominates intArr1 but the items with the same charArray values are sorted *backwards* according to intArr1 In [5]: numpy.lexsort((intArr1, charArr)) Out[5]: array([2, 1, 0, 5, 4, 3, 6, 7]) Is this a bug or am I missing something? --Tom _______________________________________________ Numpy-discussion mailing list Numpy-discussion@scipy.org http://projects.scipy.org/mailman/listinfo/numpy-discussion
