Help with creating a vector field plotter?

[Edison Orellana]

Unfortunately, the nspire doesn't have built in functionality for plotting vector fields yet. I sat down to try and build one myself but there were so many hurdles to overcome that I didn't know how to proceed.

Some problems I ran into:

• I can't figure out how to automate the input of a vector into the graphing program. The graphing program allows the insertion of vectors through Geometry>Points and Lines>Vector, but I don't know how to take a vector and automatically add it to the graph.
• I don't know how to proceed in automating the creation of a list of vectors. If I had a list of vectors like: { [x,y], [x1,y1], [x2,y2]...} then I might be able to figure out a way to insert them into the graphing application.
• How would I tell the graphing application where to put all the vectors?

Some other thoughts about how I might be able to achieve it:

• Make a function that only calculates one component of the vector and then join the two later on. 

If you have any insight into how I might go about this without getting into having to code manually in LUA, I'd appreciate some help.

For clarity, this is the kind of thing I am trying to reproduce: http://goo.gl/ULwCjQ

[John Hanna]

The only way that I know of to get something graphed is to create a data set and then do a scatterplot. Here’s a snip of what you can do:

 

The graph on the right is a scatterplot with the second attribute chaged to ‘connected’. This method lacks the arrowtips. The void cells ( _ ) cause the connected scatterplot to ‘skip’ the connection from one point to the next. 

This is how my ‘shade between graphs’ file works.

 

Regards,

    John Hanna

     jeh...@optonline.net

     www.johnhanna.us

     T³ - Teachers Teaching with Technology

     "the future isn't what it used to be."

 

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