Issue 112910 - Data Sort using 3 criteria gives incorrect result.
Data Sort using 3 criteria gives incorrect result.
 Status: CONFIRMED None Calc Application formatting (show other issues) OOO320m12 Mac Mac OS X 10 P3 Trivial (vote) --- AOO issues mailing list http://www.tsw.net.nz/files/Wanganui ...

 Reported: 2010-07-04 01:52 UTC by wheelz 2013-07-31 08:35 UTC (History) 2 users (show) elish issues DEFECT --- ---

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 wheelz 2010-07-04 01:52:34 UTC ```In the linked Spreadsheet nav. to sheet "Master". Select B5:I47 Data|Sort Sort by Column I | descending Then by Column H | descending Then by Column G | descending Result is generally ok except for H23 & H24. These are not sorted correctly. This also occurred on Sheet "C Grade" with H6 & H7 being the affected data. I6 & I7 are also out of sorts but I'm unsure how the previous sort criteria might affect this. This sort criteria is used to ascertain score hierarchy on a "count back" system when there is a tie. This is my my first Bug Submission, so I hope I've done it correctly. Regards, Pete``` Joe Smith 2010-07-04 16:04:08 UTC ```Nothing official here, just my take... I think it's a numerical problem, not a sorting problem: the values in I23 & I24 *look* the same, but they're not. As Calc compares them, I23 is a very tiny bit less than I24, so it does not compare the values in column H. I honestly can't tell you why they're different, or even how to see it. If you try =I23=I24, Calc shows TRUE, and both =I23I24 show FALSE. =1-I23/296.16 gives zero, as does =1-SUM(F23:H23)/296.16. However, if I change the formula in column I from =IF(F5="";"";SUM(F5:H5)) to =IF(F5="";"";ROUND(SUM(F5:H5);2)) --just rounding off the sum to the same number of places your data are already limited to, so it should not change the answers, then I get the expected order with your sort. You can even see it if you copy cells G23:I24 and then paste-special with only the values--no formulas--to a new sheet. If you sort those two rows, you'll see the same sort order problem, but if you just save and reload that file, or edit the values in the last column (just to re-enter them, not to change the value), then the sort gives the expected order. So it seems there's some invisible difference between the SUMs in cells I23 & I24. Surely this is a nasty problem, even if it's not literally a bug; as far as I know, it's just something that happens occasionally with any spreadsheet. Changing to "precision as shown" is one way to protect against floating-point gremlins, but it doesn't seem to help in this case.``` Edwin Sharp 2013-07-31 08:35:33 UTC ```Confirmed on Rev. 1507307 Win 7. Column I sorts OK. Column H,G do not sort OK.```