- create a new table with 2 columns - fill the table columns with row numbers - create a new custom fit - use as fit function this one a*x - set fit and evaluation interval x:10 - 25 - set start parameter a to '2' - calculate the fit result: the x-axis of the diagram is still 0 - 100 But since I only fitted and evaluated from 10 - 25 the x-axis scale should automatically be set to the evaluation interval plus 10%. So in my case to 9 - 27.5. This would speed up the work flow a lot because since I explicitly set an evaluation interval I tell LP that i am interested in this interval. I can later chance the x-axis if i really need this but in the vast majority of the cases I need the evaluation interval to be drawn. Note also: What is the difference between the fit and the evaluation interval? Please add tooltips to explain this to the user.
LP now supports auto scaling of the x range when a custom eval range is specified. The range is set to +/- 5% of the value range (not the values itself as in your example). Please check this feature when the rc3 package is available.