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 -- http://mail.python.org/mailman/listinfo/python-list