Texas Instruments TINSPIRE Reference Guide - Page 106

T, <10, countIf

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sum( ) 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( ) 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, ? Catalog > See G(), page 124. Catalog > Catalog >

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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(
Value1
[
,
Value2
[
,
Value3
[
,
...]]]
)
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 >