Instructions for using rowop.m using a computer in the Math Lab:
(On a home computer, you can use rowop.m only if you install MATLAB on your computer.  Student MATLAB can be bought from the college bookstore for about $100 by clicking on the "Sofware Shop" link at  http://www.salem.bkstr.com/  )
Right click on the link to the script rowop.m
Select "Save target as" if using Internet explorer or "Save link target as" if using Netscape.
For the filename, type   c:\rowop.m    (You may also save the file in a subdirectory, if you prefer)
For  "Save as type", select  All Files
Click on Save
Minimize the browser.
Then, double click on the MATLAB icon on the desktop (if using a computer in the Math Lab).
Type your matrix as a=[2 3 4 5;6 7 8 9;10 11 12 13] for example, if a is a 3x4 matrix.  (i.e., put brackets around the outside of the matrix.  Separate rows of the matrix with a semicolon.)
Type cd c:\
rowop
 At the prompt for Type the new matrix A, just type a  (or you may type the matrix as [2 3 4 5;6 7 8 9;10 11 12 13] for example, if a is a 3x4 matrix.).
Hit enter, and then type the appropriate responses when prompted.

• Type 1 if you want to divide a row in the matrix A by a nonzero constant.  (The program will then ask you what row and what constant you want to use).
• Type 2 if you want to perform one type 3 row operation (*row+) to replace Row k by Row k plus c times Row j.  (The program will then ask you what values of k, c and  j you want to use.
• Type 3 if you want to revert back to the last matrix A you had.  (This undoes what you did last).
• Type 4 if you want to swap two rows.  (The program will then ask what two rows you want to exchange).
• Type 5 if you want to stop execution of this script.  (You may then type rowop if you want to rerun this script or exit if you want to leave MATLAB altogether).

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