862
Appendix A: Functions and Instructions
real(
list1
)
⇒
⇒
⇒
⇒
list
Returns the real parts of all elements.
real({a+
i
ù
b,3,
i
})
¸
{a 3 0}
real(
matrix1
)
⇒
⇒
⇒
⇒
matrix
Returns the real parts of all elements.
real([a+
i
ù
b,3;c,
i
])
¸
[
a 3
c 0
]
4444
Rect
MATH/Matrix/Vector ops menu
vector
4444
Rect
Displays
vector
in rectangular form [x, y, z]. The
vector must be of dimension 2 or 3 and can be a
row or a column.
Note
:
4444
Rect
is a display-format instruction, not a
conversion function. You can use it only at the
end of an entry line, and it does not update
ans
.
Note:
See also
4
Polar
.
[3,
pà
4,
pà
6]
4
Rect
¸
[
3
ø
‡
2
4
3
ø
‡
2
4
3
ø
‡
3
2
]
[a,
b,
c]
¸
[a
ø
cos(b)
ø
sin(c)
a
ø
sin(b)
ø
sin(c) a
ø
cos(c)]
complexValue
4444
Rect
Displays
complexValue
in rectangular form a+b
i
.
The
complexValue
can have any complex form.
However, an r
e
i
q
entry causes an error in Degree
angle mode.
Note
: You must use parentheses for an (r
q
)
polar entry.
In Radian angle mode:
4
e
^(
p
/3)
4
Rect
¸
4
ø
e
p
3
(4
p
/3)
4
Rect
¸
2+2
ø
3
ø
i
In Gradian angle mode:
(1
100)
4
Rect
¸
i
In Degree angle mode:
(4
60)
4
Rect
¸
2+2
ø
3
ø
i
Note
: To type
4444
Rect
from the keyboard, press
2
for the
4444
operator. To type
, press
2 ’
.
ref()
MATH/Matrix menu
ref(
matrix1[
,
tol]
)
⇒
⇒
⇒
⇒
matrix
Returns the row echelon form of
matrix1
.
Optionally, any matrix element is treated as zero
if its absolute value is less than
tol
. This tolerance
is used only if the matrix has floating-point
entries and does not contain any symbolic
variables that have not been assigned a value.
Otherwise,
tol
is ignored.
•
If you use
¥ ¸
or set the mode to
Exact/Approx=APPROXIMATE
, computations
are done using floating-point arithmetic.
•
If
tol
is omitted or not used, the default
tolerance is calculated as:
5
E
ë
14
ù
max(dim(
matrix1
))
ù
rowNorm(
matrix1
)
Note:
See also
rref().
ref([
ë
2,
ë
2,0,
ë
6;1,
ë
1,9,
ë
9;
ë
5,
2,4,
ë
4])
¸
1
ë
2/5
ë
4/5 4/5
0 1 4/7 11/7
0 0 1
ë
62/71
[a,b,c;e,f,g]
!
m1
¸
[
]
a b c
e f g
ref(m1)
¸
1
f
e
g
e
0 1
a
ø
g
ì
c
ø
e
a
ø
f
ì
b
ø
e
Summary of Contents for Voyage 200
Page 36: ...Getting Started 36 D B D B Press Result ...
Page 45: ...Getting Started 45 3 0 D B D D B D Press Result ...
Page 46: ...Getting Started 46 D 2 0 0 2 D B Scroll down to October and press Press Result ...
Page 60: ...Getting Started 60 B D Press Result ...
Page 139: ...Previews 139 8 Complete the operation Press 2 d Steps and keystrokes Display 5 f 2 ...
Page 453: ...Differential Equation Graphing 453 ...
Page 468: ...Tables 468 ...
Page 777: ...Activities 777 ...
