Quick Reference Guide

100 TI-Nspire™ Reference Guide
T
sum(Matrix1[, Start[, End]]) ⇒ matrix
Returns a row vector containing the sums of all elements in the
columns in Matrix1.
Start and End are optional. They specify a range of rows.
Any void argument produces a void result. Empty (void) elements in
Matrix1 are ignored. For more information on empty elements, see
page 131.
sumIf()
Catalog
>
sumIf(List,Criteria[, SumList]) ⇒ value
Returns the accumulated sum of all elements in List that meet the
specified Criteria. Optionally, you can specify an alternate list,
sumList, to supply the elements to accumulate.
List can be an expression, list, or matrix. SumList, if specified, must
have the same dimension(s) as List.
Criteria can be:
• A value, expression, or string. For example, 34 accumulates only
those elements in List that simplify to the value 34.
• A Boolean expression containing the symbol ? as a placeholder
for each element. For example, ?<10 accumulates only those
elements in List that are less than 10.
When a List element meets the Criteria, the element is added to the
accumulating sum. If you include sumList, the corresponding element
from sumList is added to the sum instead.
Within the Lists & Spreadsheet application, you can use a range of
cells in place of List and sumList.
Empty (void) elements are ignored. For more information on empty
elements, see page 131.
Note: See also countIf(), page 23.
sumSeq()
See G
()
, page
124
.
system()
Catalog
>
system(Va lu e 1 [, Va lu e2 [, Val u e3 [, ...]]])
Returns a system of equations, formatted as a list. You can also
create a system by using a template.
T
(transpose)
Catalog
>
Matrix1
T
⇒ matrix
Returns the complex conjugate transpose of Matrix1.
Note: You can insert this operator from the computer keyboard by
typing @t.
sum()
Catalog
>