[Libreoffice-bugs] [Bug 46539] sigmoid curve fitting in trend lines
https://bugs.documentfoundation.org/show_bug.cgi?id=46539 Xisco Faulí changed: What|Removed |Added Priority|high|medium --- Comment #7 from Xisco Faulí --- Changing priority back to 'medium' since the number of duplicates is lower than 5 -- You are receiving this mail because: You are the assignee for the bug.___ Libreoffice-bugs mailing list Libreoffice-bugs@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/libreoffice-bugs
[Libreoffice-bugs] [Bug 46539] sigmoid curve fitting in trend lines
https://bugs.documentfoundation.org/show_bug.cgi?id=46539 Thomas Lendo changed: What|Removed |Added Blocks||108538 Referenced Bugs: https://bugs.documentfoundation.org/show_bug.cgi?id=108538 [Bug 108538] [META] Chart feature enhancements -- You are receiving this mail because: You are the assignee for the bug.___ Libreoffice-bugs mailing list Libreoffice-bugs@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/libreoffice-bugs
[Libreoffice-bugs] [Bug 46539] sigmoid curve fitting in trend lines
https://bugs.freedesktop.org/show_bug.cgi?id=46539 --- Comment #6 from James Salsman 2012-02-23 18:21:37 PST --- (In reply to comment #5) >... > "* Gompertz sigmoid – Regression with a logistic sigmoid function – s/logistic/Gompertz/ on that line. Sorry. -- Configure bugmail: https://bugs.freedesktop.org/userprefs.cgi?tab=email --- You are receiving this mail because: --- You are the assignee for the bug. ___ Libreoffice-bugs mailing list Libreoffice-bugs@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/libreoffice-bugs
[Libreoffice-bugs] [Bug 46539] sigmoid curve fitting in trend lines
https://bugs.freedesktop.org/show_bug.cgi?id=46539 James Salsman changed: What|Removed |Added Priority|medium |high -- Configure bugmail: https://bugs.freedesktop.org/userprefs.cgi?tab=email --- You are receiving this mail because: --- You are the assignee for the bug. ___ Libreoffice-bugs mailing list Libreoffice-bugs@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/libreoffice-bugs
[Libreoffice-bugs] [Bug 46539] sigmoid curve fitting in trend lines
https://bugs.freedesktop.org/show_bug.cgi?id=46539 --- Comment #5 from James Salsman 2012-02-23 18:10:08 PST --- Well, that looks terrible pasted into bugzilla. The two lines in question are: "* logistic sigmoid – Regression with a logistic sigmoid function – approximate the values of the series using the model: y = A+B/(1+e^(-(x-C)/D)) "* Gompertz sigmoid – Regression with a logistic sigmoid function – approximate the values of the series using the model: y = A+B·e^(C·e^(D·x))" -- Configure bugmail: https://bugs.freedesktop.org/userprefs.cgi?tab=email --- You are receiving this mail because: --- You are the assignee for the bug. ___ Libreoffice-bugs mailing list Libreoffice-bugs@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/libreoffice-bugs
[Libreoffice-bugs] [Bug 46539] sigmoid curve fitting in trend lines
https://bugs.freedesktop.org/show_bug.cgi?id=46539 --- Comment #4 from James Salsman 2012-02-23 18:06:41 PST --- [done:] Date: Thu, 23 Feb 2012 19:05:44 -0700 Subject: sigmoid curve fitting in trend lines From: James Salsman To: robert_w...@us.ibm.com, office-comm...@lists.oasis-open.org Rob Weir Chair OASIS Open Document Format for Office Applications (OpenDocument) Technical Committee Dear Mr. Weir: True exponential curves do not actually exist in economics, biology, or any other finite field. They are all sigmoid curves such as the logistic or Gompertz curve. Offering users the ability to fit a trend line to an exponential curve but not a logistic and Gompertz sigmoid does them a disservice, and makes it much more likely that they will make extrapolation errors. Therefore, I request that you modify OASIS Standard OpenDocument-v1.2-part1, Section 20.43, "chart:regression-type" [ http://docs.oasis-open.org/office/v1.2/os/OpenDocument-v1.2-os-part1.html#_= _RefHeading__1419514_253892949 ] as follows: At the end of the bulleted list under "The defined values for the chart:regression-type attribute are:", please add: "* logistic sigmoid =E2=80=93 Regression with a logistic sigmoid function = =E2=80=93 approximate the values of the series using the model: y =3D A+B/(1+e^(-(x-C)/D)) "* Gompertz sigmoid =E2=80=93 Regression with a logistic sigmoid function = =E2=80=93 approximate the values of the series using the model: y =3D A+B=C2=B7e^(C=C2=B7e^(D=C2=B7x))" Please let me know by email to jps-oasis-regress...@talknicer.com if you have any questions about this request. Thank you. Best regards, James Salsman Ref.: https://bugs.freedesktop.org/show_bug.cgi?id=3D46539 -- Configure bugmail: https://bugs.freedesktop.org/userprefs.cgi?tab=email --- You are receiving this mail because: --- You are the assignee for the bug. ___ Libreoffice-bugs mailing list Libreoffice-bugs@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/libreoffice-bugs
[Libreoffice-bugs] [Bug 46539] sigmoid curve fitting in trend lines
https://bugs.freedesktop.org/show_bug.cgi?id=46539 James Salsman changed: What|Removed |Added Status|UNCONFIRMED |NEW Ever Confirmed|0 |1 --- Comment #3 from James Salsman 2012-02-23 17:43:13 PST --- (In reply to comment #1) > Can you write a proposal to OASIS? Regina, I understand that I need to request a change to http://docs.oasis-open.org/office/v1.2/os/OpenDocument-v1.2-os-part1.html#__RefHeading__1419514_253892949 but where do I send that request? -- Configure bugmail: https://bugs.freedesktop.org/userprefs.cgi?tab=email --- You are receiving this mail because: --- You are the assignee for the bug. ___ Libreoffice-bugs mailing list Libreoffice-bugs@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/libreoffice-bugs
[Libreoffice-bugs] [Bug 46539] sigmoid curve fitting in trend lines
https://bugs.freedesktop.org/show_bug.cgi?id=46539 --- Comment #2 from James Salsman 2012-02-23 14:40:49 PST --- (In reply to comment #1) > The current standard ODF1.2 specifies only that kind of curves, which are > implemented already. To get new kind of regression curves a addition to the > standard is needed. Can you write a proposal to OASIS? It need not contain the > algorithm but a reference to the mathematical definition is needed. Regina, I am very happy to do so, but please send me the URL to instructions if any, or at least the sub-organization involved, and email address(es) if you have them. As for the mathematical definition, please see: http://en.wikipedia.org/wiki/Logistic_function and http://en.wikipedia.org/wiki/Gompertz_function -- Configure bugmail: https://bugs.freedesktop.org/userprefs.cgi?tab=email --- You are receiving this mail because: --- You are the assignee for the bug. ___ Libreoffice-bugs mailing list Libreoffice-bugs@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/libreoffice-bugs
[Libreoffice-bugs] [Bug 46539] sigmoid curve fitting in trend lines
https://bugs.freedesktop.org/show_bug.cgi?id=46539 Regina Henschel changed: What|Removed |Added CC||rb.hensc...@t-online.de --- Comment #1 from Regina Henschel 2012-02-23 14:35:53 PST --- The current standard ODF1.2 specifies only that kind of curves, which are implemented already. To get new kind of regression curves a addition to the standard is needed. Can you write a proposal to OASIS? It need not contain the algorithm but a reference to the mathematical definition is needed. There have already been proposals for new kind of regression curves, so it is likely that additional types are possible for ODF1.3 -- Configure bugmail: https://bugs.freedesktop.org/userprefs.cgi?tab=email --- You are receiving this mail because: --- You are the assignee for the bug. ___ Libreoffice-bugs mailing list Libreoffice-bugs@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/libreoffice-bugs
