Appendix
263
System Variable Table
The table below shows an alphabetic listing of system variables.
• If a variable has an initial value, the value is shown inside of braces ({ }) in the “Name” column.
• The letter to the left of the slash in the “Op” column indicates whether or not input for the variable is supported,
while the letter to the right of the slash indicates whether or not the variable can be deleted (Y: Yes, N: No).
Note:
Use the Define command to input a value for a Type “F” (FUNC) variable. For an example about how to
do this, see “Define” on page 88.
• The “Type” column indicates the data type of the variable.
Ex: EXPR, St: STR, L: LIST, M: MAT, F: FUNC, _r: Real Number
Name
Description
Op
Type
a
0
{0}
Sequence variable
Y/N
Ex_r
a
1
{0}
Sequence variable
Y/N
Ex_r
a
2
{0}
Sequence variable
Y/N
Ex_r
a
Coef
Regression coefficient
a
N/N
Ex_r
ac
Seq
Sequence graph trace variable
N/N
Ex_r
a
n
Recursion expression variable
N/N
St
a
n
+1
Recursion expression variable
Y/Y
St
a
n
+2
Recursion expression variable
Y/Y
St
a
n
0
Recursion internal variable
N/N
Ex_r
a
n
1
Recursion internal variable
N/N
Ex_r
a
n
2
Recursion internal variable
N/N
Ex_r
a
n
E
Sequence expression
Y/Y
St
a
n
E
0
Recursion internal variable
N/N
Ex_r
ans
Latest result output by Main or
eActivity application
N/N
Ex/L/M/
St
a
n
Start {0}
Sequence variable
Y/N
Ex_r
b
0
{0}
Sequence variable
Y/N
Ex_r
b
1
{0}
Sequence variable
Y/N
Ex_r
b
2
{0}
Sequence variable
Y/N
Ex_r
b
Coef
Regression coefficient
b
N/N
Ex_r
bc
Seq
Sequence graph trace variable
N/N
Ex_r
b
n
Recursion expression variable
N/N
St
b
n
+1
Recursion expression variable
Y/Y
St
b
n
+2
Recursion expression variable
Y/Y
St
b
n
0
Recursion internal variable
N/N
Ex_r
b
n
1
Recursion internal variable
N/N
Ex_r
b
n
2
Recursion internal variable
N/N
Ex_r
b
n
E
Sequence expression
Y/Y
St
b
n
E
0
Recursion internal variable
N/N
Ex_r
b
n
Start {0}
Sequence variable
Y/N
Ex_r
c
0
{0}
Sequence variable
Y/N
Ex_r
c
1
{0}
Sequence variable
Y/N
Ex_r
c
2
{0}
Sequence variable
Y/N
Ex_r
Name
Description
Op
Type
c
Coef
Regression coefficient
c
N/N
Ex_r
cc
Seq
Sequence graph trace variable
N/N
Ex_r
c
n
Recursion expression variable
N/N
St
c
n
+1
Recursion expression variable
Y/Y
St
c
n
+2
Recursion expression variable
Y/Y
St
c
n
0
Recursion internal variable
N/N
Ex_r
c
n
1
Recursion internal variable
N/N
Ex_r
c
n
2
Recursion internal variable
N/N
Ex_r
c
n
E
Sequence expression
Y/Y
St
c
n
E
0
Recursion internal variable
N/N
Ex_r
c
n
Start {0}
Sequence variable
Y/N
Ex_r
ConicsEq
Conics expression
Y/Y
St
d
Coef
Regression coefficient
d
N/N
Ex_r
df
Degrees of freedom
N/N
Ex_r
df
A
Degrees of freedom for factor A
N/N
Ex_r
df
AB
Degrees of freedom for factor A
× Factor B
N/N
Ex_r
df
B
Degrees of freedom for factor B
N/N
Ex_r
df
Err
Degrees of freedom for error
N/N
Ex_r
e
Coef
Regression coefficient
e
N/N
Ex_r
Expected
Expected matrix for
χ
2
test
N/N
M_r
FEnd {5}
Table creation variable
Y/N
Ex_r
FResult
Table result variable
N/N
M
FStart {1}
Table creation variable
Y/N
Ex_r
FStep {1}
Table creation variable
Y/N
Ex_r
Fvalue
F
value
N/N
Ex_r
FvalueA
F
value for factor A
N/N
Ex_r
FvalueAB
F
value for factor A × factor B
N/N
Ex_r
FvalueB
F
value for factor B
N/N
Ex_r
GconHEnd
{5}
Graph transformation vertical
end point
N/N
Ex_r
GconHStart
{1}
Graph transformation vertical
start point
N/N
Ex_r