Hi Bruce,<br><br>Ahh, but I would have thought the precision for the array operation would be the same no matter which values I wish to sum? The array is in float64 in all cases.<br><br>I would not have thought altering the type of the integer values would make any difference as these indices are all below 5 milllion.<br>
<br>Perhaps I have misunderstood your suggestion could you expand.<br><br>Cheers,<br><br>Hanni<br><br><br><div class="gmail_quote"><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
Also, increase the numerical precision as that may depend on your<br>
platform especially given the input values above are ints. Numpy has<br>
float128 and int64 that will minimize rounding error.<br>
<font color="#888888"><br>
Bruce<br>
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