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Pivot
You can upload an automatic pivot program to your TI-84 Plus (or TI-83 Plus) calculator.
The procedure on this page does not work for the original TI-83.
Once you specify a pivot element of a matrix, the program carries out all necessary row operations.
You can upload an automatic pivot program to your TI-84 Plus (or TI-83 Plus) calculator.
The procedure on this page does not work for the original TI-83.
Once you specify a pivot element of a matrix, the program carries out all necessary row operations.
| What You Need | Where to Get |
| USB cable* |
Comes with TI-84 Plus |
| *If you have a TI-83 Plus, you will need to purchase this cable. The KU Bookstore can order one for you. DO NOT wait until the last minute. |
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| If you have lost the USB cable for TI-84 Plus, don’t worry—it is a standard MINI B to Type A USB cable. I have seen one at Dollar Tree downtown. If you want to get it on eBay, use a search string “retractable usb mini b.” I just bought one as a spare myself! |
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| TI Connect software (Download from a link on the right) |
Mac OS or Windows OS |
| Automatic pivot program (.zip file named Pivot.8xp.zip) Caution: This pivot program does not run on TI-83. |
Click here to Download. Then, unzip the file. |
| Preparation | What to Do |
| Install TI Connect software on your computer. | Run the installer |
| Connect your TI-84 Plus (or TI-83 Plus) to a computer with the USB cable. | Plug it in! |
| What to Do | Images |
| Unzip the pivot program and extract a file named Pivot.8xp. |  |
| Launch TI Device Explorer software within the TI Connect folder. |  |
| You will see a window like this. If your TI is not recognized, you may need to update the operating system on the TI. See this tutorial. |
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| Choose File > Send Files to Selected Device > Send. (If you do not see this menu item, simply drag the file Pivot.8xp onto the TI Device Explorer’s window. It should then be uploaded automatically.) |
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| Navigate to Pivot.8xp and click on Send to Device. |
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| How to Use the Program | Screen Shots |
| Important! The matrix you want to pivot must be in matrix [A]. |
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| Let’s say you have a 3x3 matrix like this: |  |
| Suppose that you want to pivot this matrix about 4. |  |
| Press PRGM. Then, you will see this: |  |
| Press ENTER. Then, you will see this: |  |
| Press ENTER again. Then, you will see this: |  |
| Type the row # for a pivot row and press ENTER. In this tutorial, the pivot row is Row 2. |
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| Type the column # for a pivot column and press ENTER. The pivot column is Column 1. |
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| Press ENTER. Then, you will see this: As long as vertical dots at the upper-right corner of the screen are moving, the program is still running. Note that the program has even done FRAC for you!  |
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| Press ENTER again to end the program. |  |
| As an added bonus, the program has automatically saved the resulting matrix in matrix [A], replacing the original matrix. If you are solving a simplex method problem, this ends the first iteration of pivoting. Continue with further iterations as necessary. |
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| Tip! If you want to preserve the original matrix, put it in matrix [B]. Then, copy it to matrix [A] using STO›. |
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| Course Info | Office Hours | Exams | LiveMath | TI | Help | |
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| KU Interactive Mathematics |
Disclaimer • Updated October 23, 2008
Email: mitsuma@kutztown.edu
Phone: +1 (610) 462-WPJW
Phone: +1 (610) 462-WPJW