FindGraph 1.571 - User Guide and FAQ

Frequently Asked Questions - FindGraph

1. I have a set of X,Y data points generated by another application. How to plot a line graph with these points?
   
   To import a file in the text format use [Menu][Points][Add from file...]. Text file with one point per line. Possible dividers: space, tabulator or comma.
   
   
2. I need to be able to do is to take a poor quality graph on the screen and manually assign x-y values to each of the points I want by putting the cursor over the point and clicking.
   
   Open options dialog and select your picture as background. The program supports bmp, gif, jpg, wmf and emf formats. Assign editor mode [Drop Points]. To drop point, put the cursor over the point and click.
   
   
3. I have some curves from data sheets (PDF files). Wonder how to use FindGraph to find X,Y values of several points on each of these curves and eventually find equations to represents these curves. Is FindGraph capable of doing that?
   
   First of all you have to didgitize the data ((PDF file image). To digitize graphs from graphic images, select menu item [Add data from screen] and follow 5 steps. Use menu items [Fit] to find best curve fit, regresssion line or interpolate data.
   
   
4. Options of the menu: fit function, best function, linear regression and interpolate; they are all dark.
   
   To fit a curve, load your data and select it on left panel [Points]. All fit options of the menu will be enabled.
   
   
5. Is it possible to import data from Excel?
   
   Yes, FindGraph uses automation to import data from Excel.
   
   
6. How do I call FindGraph from my Visual Basic program?
   
   By far the easiest way is to use automation. Example programs with full Visual Basic (C++, too) source code are included with the FindGraph distribution.