User Manual

20090601
2-4-12
Function Calculations
I
Condition Judgment (judge, piecewise)
S\
“judge” Function
The “judge” function returns TRUE when an expression is true, and FALSE when it is false.
Problem
Use this keyboard:
Operation
mth abc cat 2D
Is the following expression
true or false?
1 = 1 TRUE
Func [judge] 1

1
U
Is the following expression
true or false?
1 < 0 FALSE
Func
[judge] 1
0
U
S
“piecewise” Function
The “piecewise” function returns one value when an expression is true, and another value
when the expression is false.
The syntax of the “piecewise” function is shown below.
piecewise(<condition expression>, <return value when true>, <return value when false or
indeterminate> [ ) ]
or
piecewise(<condition expression>, <return value when true>, <return value when false>,
<return value when indeterminate> [ ) ]
Use the 2D keyboard (

) to input “piecewise” function according to the syntax shown
below.
<return value when true>, <condition expression>
<return value when false or indeterminate>
or
<return value when condition 1 is true>, <condition 1 expression>
<return value when condition 2 is true>, <condition 2 expression>
Problem
Use this keyboard:
Operation
mth abc cat 2D
For the expression 0

x
(
x
= variable), return 1 when
x
is 0 or less, and 2 when
x
is greater than 0 or
undefined.
Func
G
[piecewise] 0

7

1

2
U
or

1
A
2
CD
0

7
U
For the expression 1

x
(
x
= variable), return 1 when
x
is 1 or less, and 2 when
x
is greater than 1.
G

1
A
2
CD
1

7
A
1
7
U