[Numpy-discussion] argmin and argmax without nan

Dmitrey tmp50@ukr....
Thu Mar 24 08:59:22 CDT 2011


          2011/3/24 Dmitrey <

     tmp50@ukr.net     >:
     > hi,
     > is there any way to get argmin and argmax of an array w/o nans?
     > Currently I have
     >>>> from numpy import *
     >>>> argmax([10,nan,100])
     > 1
     >>>> argmin([10,nan,100])
     > 1
     > But it's not the values I would like to get.
     >
     > The walkaround I use: get all indeces of nans, replace them by -inf, get
     > argmax, replace them by inf, get argmin.
     > Is there any better way? (BTW, I invoke argmin/argmax along of a chosen
     > axis)
     > D.
     
     In [3]: np.nanargmax([10, np.nan, 100])
     Out[3]: 2
     
     In [4]: np.nanargmin([10, np.nan, 100])
     Out[4]: 0
     
     Ralf
        

   Thanks, I thought np.argnanmin should do that but those funcs were
   absent.
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