Matrices 10–15
82EA17~1.DOC TI-83 international English Bob Fedorisko Revised: 10/26/05 1:31 PM Printed: 10/27/05 2:47
PM Page 15 of 16
cumSum( returns cumulative sums of the elements in matrix,
starting with the first element. Each element is the cumulative
sum of the column from top to bottom.
cumSum(matrix)
MATRX MATH menu items A through F are row operations. You
can use a row operation in an expression. Row operations do not
change matrix in memory. You can enter all row numbers and
values as expressions. You can select the matrix from the
MATRX NAMES menu.
ref( (row-echelon form) returns the row-echelon form of a real
matrix. The number of columns must be greater than or equal to
the number of rows.
ref(matrix)
rref(
(reduced row-echelon form) returns the reduced row-echelon
form of a real matrix. The number of columns must be greater than
or equal to the number of rows.
rref(matrix)
cumSum(
Row Operations
ref(, rref(
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