Texas Instruments TI-73 Software Manual page 37

cumSum( 0: Cumulative Sums
Returns cumulative sums of the elements in matrixname , starting
with the first element. Each element is the cumulative sum of the
column from top to bottom.
cumSum(
Note About Row Operations
MATRIX MTH
remaining part of this section, are row operations. You can use a
row operation in an expression. Row operations do not change
the matrix in memory. You can enter all row numbers and values
as expressions. You can select the matrix from the
menu.
Matrices for the TI-73
matrixname )
menu items through , as described in the
A F
2, 2+4, 2+4+6
1, 1+3, 1+3+5
MATRIX NAME
Page 37