Hello All, I want to unsubscribe from this group, can anyone please guide? Sorry for the trouble. RegardsJavinOn Fri, Apr 26, 2019 at 3:24 PM Max Lipsky <maxlipsky@gmail.com> wrote:Hello Tom! I think is too much for roundoff errorFound funny post about it:https://randomascii.wordpress.com/2014/10/09/intel-underestimates-error-bounds-by-1-3-quintillion/http://notabs.org/fpuaccuracy/index.htmOn 25 Apr 2019, at 19:56, Tom Lane <tgl@sss.pgh.pa.us> wrote:Max Lipsky <maxlipsky@gmail.com> writes:SELECT acos( cos(radians(48.9193)) * cos(radians(48.9193)) * cos(radians(2.5431) - radians(2.5431)) + sin(radians(48.9193)) * sin(radians(48.9193)) ) as result;This returned [22003] ERROR: input is out of range Not too surprising, because (at least on my machine) regression=# select cos(radians(48.9193)) regression-# * cos(radians(48.9193)) + sin(radians(48.9193)) regression-# * sin(radians(48.9193)); ?column? -------------------- 1.0000000000000002 (1 row) Problems of this sort are inevitable when working with finite-precision math.https://en.wikipedia.org/wiki/Round-off_error regards, tom lane -- Thanks Javinhttp://javarevisited.blogspot.com/ Twitter : https://twitter.com/javinpaul blog : http://java67.blogspot.comblog : http://savingsfunda.blogspot.com
Hello Tom! I think is too much for roundoff errorFound funny post about it:https://randomascii.wordpress.com/2014/10/09/intel-underestimates-error-bounds-by-1-3-quintillion/http://notabs.org/fpuaccuracy/index.htmOn 25 Apr 2019, at 19:56, Tom Lane <tgl@sss.pgh.pa.us> wrote:Max Lipsky <maxlipsky@gmail.com> writes:SELECT acos( cos(radians(48.9193)) * cos(radians(48.9193)) * cos(radians(2.5431) - radians(2.5431)) + sin(radians(48.9193)) * sin(radians(48.9193)) ) as result;This returned [22003] ERROR: input is out of range Not too surprising, because (at least on my machine) regression=# select cos(radians(48.9193)) regression-# * cos(radians(48.9193)) + sin(radians(48.9193)) regression-# * sin(radians(48.9193)); ?column? -------------------- 1.0000000000000002 (1 row) Problems of this sort are inevitable when working with finite-precision math.https://en.wikipedia.org/wiki/Round-off_error regards, tom lane
On 25 Apr 2019, at 19:56, Tom Lane <tgl@sss.pgh.pa.us> wrote:Max Lipsky <maxlipsky@gmail.com> writes:SELECT acos( cos(radians(48.9193)) * cos(radians(48.9193)) * cos(radians(2.5431) - radians(2.5431)) + sin(radians(48.9193)) * sin(radians(48.9193)) ) as result;This returned [22003] ERROR: input is out of range Not too surprising, because (at least on my machine) regression=# select cos(radians(48.9193)) regression-# * cos(radians(48.9193)) + sin(radians(48.9193)) regression-# * sin(radians(48.9193)); ?column? -------------------- 1.0000000000000002 (1 row) Problems of this sort are inevitable when working with finite-precision math.https://en.wikipedia.org/wiki/Round-off_error regards, tom lane
SELECT acos( cos(radians(48.9193)) * cos(radians(48.9193)) * cos(radians(2.5431) - radians(2.5431)) + sin(radians(48.9193)) * sin(radians(48.9193)) ) as result;
This returned [22003] ERROR: input is out of range
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