To comment on the following update, log in, then open the issue: http://www.openoffice.org/issues/show_bug.cgi?id=42946
------- Additional comments from j...@openoffice.org Tue Jun 2 13:10:26 +0000 2009 ------- Obviously, error bars are a must , and in most scientific occasions, they occur on both Y and X axis (and vary from entry to entry). I have set up a small demonstration on how to fit recursion curves on my web page. Until recently, it could only be used in MS (needing their solver) Now, with the new non-linear solver as an add-on, it works beautifully in OpenOffice, but .. still lacks the horizontal error bars, This small worksheet uses a chi-squared , modified to include horizontal errors, the second link shows how the "blind" fitting tool of Excel is completely fooled in such cases (get the right gravity, but the wrong sign .. upwards!) http://homepages.ulb.ac.be/~frere/Labo/EffectiveVariance+EnC.xls http://homepages.ulb.ac.be/~frere/Labo/EffectiveVariance+En-ExcelWRONGC.xls --------------------------------------------------------------------- Please do not reply to this automatically generated notification from Issue Tracker. Please log onto the website and enter your comments. http://qa.openoffice.org/issue_handling/project_issues.html#notification --------------------------------------------------------------------- To unsubscribe, e-mail: issues-unsubscr...@graphics.openoffice.org For additional commands, e-mail: issues-h...@graphics.openoffice.org --------------------------------------------------------------------- To unsubscribe, e-mail: allbugs-unsubscr...@openoffice.org For additional commands, e-mail: allbugs-h...@openoffice.org
