Texas Instruments TINSPIRE Reference Guide - Page 52

Value_If_false

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If If BooleanExpr1 Then Block1 ElseIf BooleanExpr2 Then Block2 © ElseIf BooleanExprN Then BlockN EndIf Allows for branching. If BooleanExpr1 evaluates to true, executes Block1. If BooleanExpr1 evaluates to false, evaluates BooleanExpr2, and so on. Catalog > ifFn( ) Catalog > ifFn(BooleanExpr,Value_If_true [,Value_If_false [,Value_If_unknown]]) ⇒ expression, list, or matrix Evaluates the boolean expression BooleanExpr (or each element from BooleanExpr ) and produces a result based on the following rules: • BooleanExpr can test a single value, a list, or a matrix. • If an element of BooleanExpr evaluates to true, returns the corresponding element from Value_If_true. • If an element of BooleanExpr evaluates to false, returns the corresponding element from Value_If_false. If you omit Value_If_false, returns undef. • If an element of BooleanExpr is neither true nor false, returns the corresponding element Value_If_unknown. If you omit Value_If_unknown, returns undef. • If the second, third, or fourth argument of the ifFn() function is a single expression, the Boolean test is applied to every position in BooleanExpr. Test value of 1 is less than 2.5, so its corresponding Value_If_True element of 5 is copied to the result list. Test value of 2 is less than 2.5, so its corresponding Value_If_True element of 6 is copied to the result list. Test value of 3 is not less than 2.5, so its corresponding Value_If_False element of 10 is copied to the result list. Value_If_true is a single value and corresponds to any selected position. Note: If the simplified BooleanExpr statement involves a list or matrix, all other list or matrix arguments must have the same dimension(s), and the result will have the same dimension(s). Value_If_false is not specified. Undef is used. imag( ) imag(Value1) ⇒ value Returns the imaginary part of the argument. imag(List1) ⇒ list Returns a list of the imaginary parts of the elements. One element selected from Value_If_true. One element selected from Value_If_unknown. Catalog > 46 TI-Nspire™ Reference Guide

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46
TI-Nspire™ Reference Guide
If
BooleanExpr1
Then
Block1
ElseIf
BooleanExpr2
Then
Block2
©
ElseIf
BooleanExprN
Then
BlockN
EndIf
Allows for branching. If
BooleanExpr1
evaluates to true, executes
Block1
. If
BooleanExpr1
evaluates to false, evaluates
BooleanExpr2
, and so on.
ifFn()
Catalog >
ifFn(
BooleanExpr
,
Value_If_true
[
,
Value_If_false
[
,
Value_If_unknown
]]
)
⇒
expression, list, or matrix
Evaluates the boolean expression
BooleanExpr
(or each element
from
BooleanExpr
) and produces a result based on the following
rules:
•
BooleanExpr
can test a single value, a list, or a matrix.
•
If an element of
BooleanExpr
evaluates to true, returns the
corresponding element from
Value_If_true
.
•
If an element of
BooleanExpr
evaluates to false, returns the
corresponding element from
Value_If_false
. If you omit
Value_If_false
, returns undef
.
•
If an element of
BooleanExpr
is neither true nor false, returns
the corresponding element
Value_If_unknown
. If you omit
Value_If_unknown
, returns undef.
•
If the second, third, or fourth argument of the
ifFn()
function is a
single expression, the Boolean test is applied to every position in
BooleanExpr
.
Note:
If the simplified
BooleanExpr
statement involves a list or
matrix, all other list or matrix arguments must have the same
dimension(s), and the result will have the same dimension(s).
Test value of
1
is less than 2.5, so its corresponding
Value_If_True
element of
5
is copied to the result list.
Test value of
2
is less than 2.5, so its corresponding
Value_If_True
element of
6
is copied to the result list.
Test value of
3
is not less than 2.5, so its corresponding
Value_If_False
element of
10
is copied to the result list.
Value_If_true
is a single value and corresponds to any selected
position.
Value_If_false
is not specified. Undef is used.
One element selected from
Value_If_true
. One element
selected from
Value_If_unknown
.
imag()
Catalog >
imag(
Value1
)
⇒
value
Returns the imaginary part of the argument.
imag(
List1
)
⇒
list
Returns a list of the imaginary parts of the elements.
If
Catalog >