Appendix A: Functions and Instructions 835
RclGDB CATALOG
RclGDB
GDBvar
Restores all the settings stored in the Graph
database variable
GDBvar
.
For a listing of the settings, see
StoGDB
.
Note: It is necessary to have something saved in
GDBvar
before you can restore it.
RclGDB GDBvar
¸ Done
RclPic CATALOG
RclPic
picVar
[,
row
,
column
]
Displays the Graph screen and adds the picture
stored in
picVar
at the upper left-hand corner pixel
coordinates (
row
,
column
) using OR logic.
picVar
must be a picture data type.
Default coordinates are (0, 0).
real() MATH/Complex menu
real(
expression1
) ⇒
expression
Returns the real part of the argument.
Note: All undefined variables are treated as real
variables. See also
imag()
.
real(2+3
i
)
¸ 2
real(z)
¸ z
real(x+
i
y)
¸ x
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
]
4Rect MATH/Matrix/Vector ops menu
vector
4Rect
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:
4Rect
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
4Polar
.
[3,opà4,opà6]4Rect
¸
[
3ø ‡2
4
3ø ‡2
4
3ø ‡3
2
]
[a,ob,oc]
¸ [aø cos(b)ø sin(c)
aø sin(b)ø sin(c) aø cos(c)]
complexValue
4Rect
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
oq
) polar
entry.
In Radian angle mode:
4
e
^(p/3)4Rect ¸ 4ø
e
p
3
(4op/3)4Rect ¸ 2+2ø 3ø
i
In Degree angle mode:
(4o60)4Rect ¸ 2+2ø 3ø
i
Note: To type
4Rect
from the keyboard, press
2 p
for the
4
operator. To type
o
, press
2 ’
.
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