<p>How do I do this on TI 89?
Matrices were easy to do on TI-83.</p>
<p>On 89, I know I go to 2nd Math, Matrix. But what do I do after that?
I'm taking IIC, but I don't think they'll let me use 2 calculators.</p>
<p>Lol I had the EXACT same problem. Its so complicated. You have to enter data/matrixes in applications...i had a networking teacher explain it to me...its weird....u have to name and save the matrix first then put in the dimensions and finnaly put in the numbers. After that I'm not sure how to get them in the home page...but i'll figure it out. 2nd Math Matrix is only for doing stuff to the matrixes (or making random ones), not making new ones.</p>
<p>TI-89 uses a file system so everything are in files, rather than in some sort of list like the TI-83. The Data/Matrices editor is used for entering matrices. In this program, the starting screen will prompt for the tyle of data, either Data, List, or Matrix. You can ignore the dimensions here because they can be easily changed within the editor. Then, you can save the matrix as a file somewhere in the file system, much like a computer program. Then, you can call the matrix as a parameter in the functions of the calculator, much like programming languages.</p>
<p>To view the file system, press [2ND] [VAR-LINK]. This will display all the directories and all files. The matrix you saved should be there somewhere.</p>
<p>If you want to input a matrix into the command line I believe it goes like this:</p>
<p>[a11,a12,a13,a14;a21,a22,a23,a24;.... etc... a44] and then store it in a variable name.</p>