Can I import a graph from an Adobe .pdf file or Excel .xls file and obtain the graph's abscissa and ordinate at any point on the graph?
With Vernier's Graphical Analysis software you can import and modify data from various applications including word processing software like Acrobat Reader or spreadsheet applications like Microsoft Excel.
For further information on how to work with the imported data please consult the manual: http://www2.vernier.com/manuals/ga3manual.pdf