I've put together a program that will plot 3D electric potential surfaces
obtained from an electric field mapping apparatus and an MPLI interface.
Using a paper grid on the electric field apparatus and a corresponding grid in
the software, you can enter voltages into the program with a click of the
mouse. Once you have acquired all the voltages, you can then view a 3D plot
with tilting and rotating capabilities. The software runs on Windows 3.1 or
95. There is an example data.txt file that shows the pattern due to a bar and
point pattern. There is also a Works 2.0 grid.wks file that I use to print
out paper grids for use on the electric field apparatus. The software is
free. You can download it from the Lab 2 link within the url below. It's
called voltlab.zip. Labs 2 and 3 are a two part lab that you might look at.
To download voltlab.zip, follow the link below. Then click on the Lab 2 link.
Within the Lab 2 link is a link (about in the middle of this lab handout) to
download voltlab.zip. Unzip voltlab.zip and double click on voltlab.exe to
run.