Sheldon skrev: > Hi, > > I am trying to build a large array using concatenate function in > python. > So as I loop over the number of arrays, of which there are 12 (4 down > and 3 across), I create 3 long arrays by concatenating them at the > bottom and then concatenating them side by side: > for ind in range(num_arrays): > if ind == 0: > bias_down1 = array(bias) > ppslon1 = array(ppslon) > > ppslat1 = array(ppslat) > > elif ind > 0 and <= 3: > bias_down1 = concatenate((bias_down1,bias),0) > > ppslon1 = concatenate((ppslon1,ppslon),0) > > ppslat1 = concatenate((ppslat1,ppslat),0) > elif ind == 4: > bias_down2 = array(bias) > ppslon2 = array(ppslon) > ppslat2 = array(ppslat) > elif ind > 4 and ind <= 7: > bias_down2 = concatenate((bias_down2,bias),0) > > ppslon2 = concatenate((ppslon2,ppslon),0) > > ppslat2 = concatenate((ppslat2,ppslat),0) > > elif ind == 8: > bias_down3 = array(bias) > > ppslon3 = array(ppslon) > > ppslat3 = array(ppslat) > > elif ind > 8: > bias_down3 = concatenate((bias_down3,bias),0) > ppslon3 = concatenate((ppslon3,ppslon),0) > ppslat3 = concatenate((ppslat3,ppslat),0) > > bias_a = concatenate((bias_down1,bias_down2),1) # joining the arrays > side by side > bias_all = concatenate((bias_a,bias_down3),1) > > ppslat_a = concatenate((ppslat1,ppslat2),1) > ppslat_all = concatenate((ppslat_a,ppslat3),1) > > ppslon_a = concatenate((ppslon1,ppslon2),1) > ppslon_all = concatenate((ppslon_a,ppslon3),1) > > print 'Max lat', max(max(ppslat_all)), '\t','Min lat', > min(min(ppslat_all)) > print 'Max lon', max(max(ppslon_all)), '\t','Min lon', > min(min(ppslon_all)) > > ***************** > Now this works, the array size is correct but the longitude values > given for max and min are wrong. What is even stranger to me is that > when I write the array in binary format to a file and read it with > Matlab, the max and min are correct but when I read it back with python > the max and min are again incorrect for only the longitude data. I > saved the max and min for the longitude for each array and then check > it in the python program and they are correct at the end but the > max(max(ppslon)) values is incorrect. Does anyone knows why this is > so? > If I was doing something wrong then Matlab would not have returned > correct values. > > Any help is appreciated! > > /Sheldon
Sorry, there is a small error when I wrote this part of the program: should say "ind <= 3" /sheldon -- http://mail.python.org/mailman/listinfo/python-list
