Chart2/TrendLines
From Apache OpenOffice Wiki
Contents
- 1 Allow regression lines also for bar charts
- 2 Add polynomial regression type
- 3 Allow more than one regression line for one series
- 4 Extrapolating of trend lines
- 5 Mean value for X and center of gravity
- 6 Trend line for X
- 7 Trend line equation and coefficients
- 8 Error bar for X
- 9 Data source for values or the error bar
Allow regression lines also for bar charts
Add polynomial regression type
- Different types of regression lines are already offered: linear regression, exponential regression. But a polynomial regression curve is still missing. A macro on this site offers a workaround (french only):
- http://oooconv.free.fr/fitoo/fitoo_fr.html
Allow more than one regression line for one series
Extrapolating of trend lines
- Trend lines should also allow extrapolating. If data ranges from 1 to 5 but that x axes range from -2 to 10, then the trend line should display from -2 to +10.
- In Excel, the setting is called forward forecast and backward forecast.
Mean value for X and center of gravity
- Get the mean value not only for Y but also for X. A special symbol could mark the intersection point (the center of gravity).
Trend line for X
- Trend for X added to the existent Y trend line
Trend line equation and coefficients
- It's not possible to automatically add the equation of the trend line and the coefficients.
- This point is one of the last that block several schools migrations.
Error bar for X
- Error bar for X added to the existent Y one
Data source for values or the error bar
- Obtain the value of the error bar from row or column in Calc
