[graphics-issues] [Issue 87324] regression curve with erro r bars incorrect
To comment on the following update, log in, then open the issue: http://www.openoffice.org/issues/show_bug.cgi?id=87324 --- Additional comments from [EMAIL PROTECTED] Tue Nov 25 16:31:49 + 2008 --- Yes it is still valid but it is a design issue. The question is to know if you prefer to be excel-compatible even when excel is wrong or even buggy or if you prefer to implement the best possible behavior (For curve fitting, gnuplot is definitely better than excel). - 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: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
[graphics-issues] [Issue 87324] regression curve with erro r bars incorrect
To comment on the following update, log in, then open the issue: http://www.openoffice.org/issues/show_bug.cgi?id=87324 --- Additional comments from [EMAIL PROTECTED] Thu Mar 27 13:23:32 + 2008 --- I just checked with Excel2006 and Gnumeric. Both have the same problem than OOo-DEV300. I still think that the gnuplot approach is the correct one, but it may be better for compatibility reasons to either stick with the current implementation or to add an option for the fitting Weight data using error values - 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: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
[graphics-issues] [Issue 87324] regression curve with erro r bars incorrect
To comment on the following update, log in, then open the issue: http://www.openoffice.org/issues/show_bug.cgi?id=87324 User kla changed the following: What|Old value |New value Assigned to|kla |iha Target milestone|--- |OOo 3.x --- Additional comments from [EMAIL PROTECTED] Wed Mar 26 10:10:20 + 2008 --- Hi Iha, pls have a look. kla - 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: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
[graphics-issues] [Issue 87324] regression curve with erro r bars incorrect
To comment on the following update, log in, then open the issue: http://www.openoffice.org/issues/show_bug.cgi?id=87324 Issue #|87324 Summary|regression curve with error bars incorrect Component|Chart Version|DEV300m3 Platform|All URL| OS/Version|All Status|UNCONFIRMED Status whiteboard| Keywords| Resolution| Issue type|DEFECT Priority|P3 Subcomponent|code Assigned to|kla Reported by|pmartineau --- Additional comments from [EMAIL PROTECTED] Fri Mar 21 22:04:15 + 2008 --- Thanks for the new possibility to add custom error bars, this is a fantastic improvement for the use in Sciences. However, the current implementation of the regression curve is incorrect when using error bars. Usually, error bars are interpreted as the standard deviation of the y. When making a regression, you should minimize Chi^2 = Sum((y-yi)^2/s^2) where s is the standard deviation Currently, the s parameter is not used. Whatever the values in the error column, the fit is the same. I have attached a file with simple data: X Y Error 1 1 0.1 2 1.5 1 3 3.2 O.1 With OOo, slope=1.1 intercept= -0.3 With Gnuplot, slope=1.1 intercept= -0.102985 If you use equally weighted data in Gnuplot (A constant error of 1), you get the same values that in OOo. - 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: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
[graphics-issues] [Issue 87324] regression curve with erro r bars incorrect
To comment on the following update, log in, then open the issue: http://www.openoffice.org/issues/show_bug.cgi?id=87324 --- Additional comments from [EMAIL PROTECTED] Fri Mar 21 22:05:30 + 2008 --- Created an attachment (id=52239) Comparison of the same fit between OOo and Gnuplot - 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: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
