Solution 13323: Using the RandMat() Function on the TI-89 Family, TI-92 Family and Voyage™ 200 Graphing Calculators.
How do you use the randMat() function on the TI-89 family, TI-92 family and Voyage 200 graphing calculator?
The syntax for the randMat() function is listed below.
The randMat() function returns a matrix of integers between -9 and 9 of the specified dimension. Reference the example provided below.
Ex. Create a random generated matrix with 3 rows and 3 columns.
• From the HOME screen press [2ND] [MATH]
• Select 7:Probability and 7:randMat(
• Press  [,]  and [ENTER] to display the matrix solution
For additional instructions, refer to the online guidebook for your calculator.