SOLUTION: I use Mac Book Pro's graphing utility called Grapher. For the life of me I can not find a command to put an augmented matrix in Row Echelon Form (should be REF under the "Equation

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Question 1121475: I use Mac Book Pro's graphing utility called Grapher. For the life of me I can not find a command to put an augmented matrix in Row Echelon Form (should be REF under the "Equations" menu but its not). Supposedly most graphing utilities "also have the ability to put a matrix in reduced row echelon form". That was a quote from appendix B p. B15 in "College Algebra concepts through functions" by Sullivan.
Hard for me to imagine Grapher utility (which appears excellent to me) can not put a matrix in Row Echelon Form....I can find the Matrix symbol without any difficulty.....not sure what to think.
Answer by ikleyn(52834) (Show Source):
You can put this solution on YOUR website!
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I used Grapher long time ago (~ 20 years ago), when it was a self-standing computer application. It used matrices for one major purpose: to build and to show isolines of two dimensional arrays (or functions of 2 variables). I am sure that Grapher allows to put in any matrix, even augmented matrix in row echelon form - it simply does not make or understand the difference between them. What it, probably, can not do - it is to reduce an augmented matrix to the row echelon form. It is not so amazing, since such matrix transformation is not the function the Grapher is supposed to do. For it, many other computer applications exist. To find appropriate sites, use GOOGLE search with keywords "augmented matrix row echelon form online calculator". For example, these sites http://www.math.odu.edu/~bogacki/cgi-bin/lat.cgi?c=rref https://www.emathhelp.net/calculators/linear-algebra/reduced-row-echelon-form-rref-caclulator/ and, probably, many others.