Hi again, Am 31.01.2014 12:35, schrieb Laurent BP:
> Stefan Weigel wrote >> > 1. Enter Data A1=11, A2=13, A3=12, A4=14, A5=16, A6=15 >> > 2. Select A1:A6 >> > 3. 4. Create a Line chart >> > 4. Insert linear trendline and show equation >> > >> > --> Equation does make sense. > If you do not specify X-values/categories, what sense can you give in the > equation for 'x'? > From my point of view, equation is useful if you need to extrapolate or > interpolate values. What else? Sure. A1= Oct | B1= 1100 US$ A2= Nov | B2= 1300 US$ A3= Dec | B3= 1200 US$ A4= Jan | B4= 1400 US$ A5= Feb | B5= 1600 US$ A6= Mar | B6= 1500 US$ Create a Column chart. Insert formula. Formula reads: f(x) = 88,57x + 1040 You can use the formula displayed in a Line chart or Column chart in order to extrapolate the row to the following months. X would be the number of the month, counting from October = 1. Extrapolate July: f(x=10) = 1926 No matter if you do specify X-values or categories or not. Anyway, there are lots of cases, where the formula is usefull in a regular chart that does not need to be a XY chart. Stefan. -- LibreOffice - Die Freiheit nehm' ich mir! _______________________________________________ List Name: Libreoffice-qa mailing list Mail address: Libreoffice-qa@lists.freedesktop.org Change settings: http://lists.freedesktop.org/mailman/listinfo/libreoffice-qa Problems? http://www.libreoffice.org/get-help/mailing-lists/how-to-unsubscribe/ Posting guidelines + more: http://wiki.documentfoundation.org/Netiquette List archive: http://lists.freedesktop.org/archives/libreoffice-qa/
