RE: looking for a program for TI-nSpire CX CAS

[John Hanna]

Hi, Ron,

Glad you like the TI-Nspire CX CAS. My favorite so far.

 

I’m familiar with linear programming and the Simplex method. I’m sure the program you are seeking exists, but I do not have it. There’s a Google Group of about 1000 member worldwide. Please join us at groups.google.com/forum/?hl=en&fromgroups#!forum/tinspire and post your request there. You’ll have an answer in a day or less, I’m sure

 

I highly recommend setting your prefs to email so that you do not need to visit the website to see what’s going on there.

 

     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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From: Ron & Irene Weiler [mailto:weile...@charter.net]
Sent: Monday, March 05, 2012 5:26 PM
To: jeh...@optonline.net
Subject: looking for a program for TI-nSpite CX CAS

 

Hello John....I am a proud and happy owner of the TI-nSpire CX  CAS handheld. Man, what a piece of technology!  John, I am looking for a program written for or by anyone for  this nSpire that involves a branch of linear algebra called linear programming. Let me give an example of what I need to calculate:  I have a function in two or more variables (e.g. x and y, or x1, x2, x3, x4, etc.) and I what to calculate what values of the variables are needed to maximize (or minimize) the function (called the objective function) given a set of constraints (inequalities) that define boundaries within which the variables can be. Now, the usual way is to graph all the inequalities on the same graph and find the coordinates of all the points of the intersections and substitute these coordinates into the objective function and find which ones maximize (minimize) the function. That is OK if the objective function uses only 2 variables (x and y for example). But, if it has 3 or more, need to use an algebraic technique to compute. The Simplex Method is what is normally used to solve this kind of problem. I’m just not adept enough with programming to write something like this myself and I am desperately looking for a program that you know of or that someone has written that will do this. Can you help me?

 

                                                                                                                          Ron Weiler

                                                                                                                  weile...@charter.net

[Eric Findlay]

Hello Ron and everyone,

I'm not sure if there is a function/program for this yet, but if it turns out that there is not, let me know.  I'd have to dust off my Simplex Method university notes, as it's been a while since I've done it, but I could probably whip something up.

  --Eric

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