RREF and determinant calculator

Section 7.4 RREF and determinant calculator

This is a calculator for computing the reduced row echelon form of a matrix. In the box below

Set the value of rows to the number of rows.
Set the value of cols to the number of columns.
Enter the matrix entries as a comma-separated list. The placement on lines is not important as long as there are rows*cols entries.

Subsection 7.4.1 RREF

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rows=3 
cols=4
M=Matrix(rows,cols,[
1,2,3,4,
5,6,7,8,
9,10,11,12
])
print ("The reduced row echelon form of ")
print (M)
print ("is")
M.rref()

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Subsection 7.4.2 Determinant

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rows=cols=3 
M=Matrix(rows,cols,[
1,2,3,
1,2,1,
3,-1,2
])
print ("The determinant of ")
print (M)
print ("is")
M.determinant()