Identity Math/Matrix Menu; If Catalog; Imag Math/Complex Menu - Texas Instruments TITANIUM TI-89 User Manual

identity()
MATH/Matrix menu
expression
identity(
Returns the identity matrix with a dimension of
expression
expression
If
CATALOG
Boolean expression
If
statement
If
Boolean expression
the single statement
statements
If Boolean expression
execution without executing the statement or
block of statements.
can be either a single statement or a
block
sequence of statements separated with the ":"
character.
Boolean expression
If
block1
Else
block2
EndIf
If
Boolean expression
and then skips
block1
If
Boolean expression
but executes
block1 and
Boolean expression1
If
block1
Boolean expression2
ElseIf
block2
© © © ©
Boolean expressionN
ElseIf
blockN
EndIf
Allows for program branching. If
expression1
Boolean expression1
Boolean expression2
imag()
MATH/Complex menu
expression1
imag(
expression1
imag(
the argument.
Note: All undefined variables are treated as real
variables. See also
) ⇒ ⇒ ⇒ ⇒
list1
imag(
Returns a list of the imaginary parts of the
elements.
830
) ⇒ ⇒ ⇒ ⇒
matrix
.
must evaluate to a positive integer.
Boolean expression
If
block
EndIf
evaluates to true, executes
or the block of
statement
block
before continuing execution.
evaluates to false, continues
Then
evaluates to true, executes
.
block2
evaluates to false, skips
.
block2
block2 can be a single statement.
Then
Then
Then
Boolean
evaluates to true, executes
evaluates to false, evaluates
, etc.
) ⇒ ⇒ ⇒ ⇒
expression
returns the imaginary part of
)
.
real()
list
identity(4) ¸
Program segment:
Then
©
:If x<0
:Disp "x is negative"
©
— —
or
©
:If x<0 Then
: Disp "x is negative"
: abs(x)! x
:EndIf
©
Program segment:
©
:If x<0 Then
: Disp "x is negative"
: Else
: Disp "x is positive or zero"
:EndIf
©
block1
Program segment:
©
:If choice=1 Then
: Goto option1
: ElseIf choice=2 Then
: Goto option2
: ElseIf choice=3 Then
: Goto option3
: ElseIf choice=4 Then
. If
block1
: Disp "Exiting Program"
: Return
:EndIf
©
imag(1+2 ) ¸
i
imag(z) ¸
imag(x+ y) ¸
i
imag({ë3,4ëi,i}) ¸
Appendix A: Functions and Instructions
1 0 0 0
 
 
0 1 0 0
 
0 0 1 0
 
0 0 0 1
2
0
y
{0 ë1 1}