thank you for all of the resonses, I have attempted all of the suggestions. It is a numpy array so I can try another list if you would prefer but I thought I would show the error anyway. the error I am receiving is ValueError: The truth value of an array with more than one element is ambiguous. Use a.any() or a.all()
on this code big_array=N.ma.concatenate(all_FFDI) for i, value in enumerate(big_array): if value==100: big_array[i]=0 elif value>=100: big_array[i]=1 print big_array On Thu, Sep 1, 2011 at 6:33 PM, Peter Otten <__pete...@web.de> wrote: > questions anon wrote: > > > I have been going round in circles trying to solve something that sounds > > simple. I have a huge array and I would like to reclassify the values. > > Firstly just make them zeros and ones, for example if the values in the > > array are less than 100 make them 0 and if greater than 100 make them 1. > > And then finally sum them together. > > I have attempted a few methods, see code below. Any feedback will be > > greatly appreciated. > > >>> import numpy > >>> all_FFDI = numpy.arange(60).reshape((3,4,5)) > >>> all_FFDI > array([[[ 0, 1, 2, 3, 4], > [ 5, 6, 7, 8, 9], > [10, 11, 12, 13, 14], > [15, 16, 17, 18, 19]], > > [[20, 21, 22, 23, 24], > [25, 26, 27, 28, 29], > [30, 31, 32, 33, 34], > [35, 36, 37, 38, 39]], > > [[40, 41, 42, 43, 44], > [45, 46, 47, 48, 49], > [50, 51, 52, 53, 54], > [55, 56, 57, 58, 59]]]) > >>> all_FFDI >= 25 > array([[[False, False, False, False, False], > [False, False, False, False, False], > [False, False, False, False, False], > [False, False, False, False, False]], > > [[False, False, False, False, False], > [ True, True, True, True, True], > [ True, True, True, True, True], > [ True, True, True, True, True]], > > [[ True, True, True, True, True], > [ True, True, True, True, True], > [ True, True, True, True, True], > [ True, True, True, True, True]]], dtype=bool) > >>> (all_FFDI >= 25).sum() > 35 > > > _______________________________________________ > Tutor maillist - Tutor@python.org > To unsubscribe or change subscription options: > http://mail.python.org/mailman/listinfo/tutor >
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