On Mon, Jan 26, 2009 at 13:48, Ariel Rokem <aro...@berkeley.edu> wrote: > Hi - I am trying to find a string in a list with strings and have come > across the following state of affairs: > In [228]: subjects > Out[228]: > ['KAA', > 'CCS', > 'EJS', > 'MNM', > 'JHS', > 'LJL', > 'DVA', > 'FCL', > 'CNC', > 'KFM', > 'APM', > 'GMC'] > In [229]: subjects[0] > Out[229]: 'KAA' > In [230]: subjects[0] == 'KAA' > Out[230]: True > In [231]: np.where(subjects == 'KAA') > Out[231]: () > In [232]: pylab.find(subjects == 'KAA') > Out[232]: array([], dtype=int32)
Well, this will never work. Python lists don't broadcast like numpy arrays. > It doesn't seem to matter if I make the list into an array: > In [233]: np.array(subjects) > Out[233]: > array(['KAA', 'CCS', 'EJS', 'MNM', 'JHS', 'LJL', 'DVA', 'FCL', 'CNC', > 'KFM', 'APM', 'GMC'], > dtype='|S3') > In [234]: pylab.find(subjects == 'KAA') > Out[234]: array([], dtype=int32) > In [235]: np.where(subjects == 'KAA') > Out[235]: () > What am I doing wrong? subjects is still a list. You did not assign the array to that name. > What does it mean that the dtype is IS3? All of your elements are length-3 strings. -- Robert Kern "I have come to believe that the whole world is an enigma, a harmless enigma that is made terrible by our own mad attempt to interpret it as though it had an underlying truth." -- Umberto Eco _______________________________________________ Numpy-discussion mailing list Numpy-discussion@scipy.org http://projects.scipy.org/mailman/listinfo/numpy-discussion