810 Appendix A: Functions and Instructions
diag() MATH/Matrix menu
diag(
list
) ⇒
⇒⇒
⇒
matrix
diag(
rowMatrix
) ⇒
⇒⇒
⇒
matrix
diag(
columnMatrix
) ⇒
⇒⇒
⇒
matrix
Returns a matrix with the values in the argument
list or matrix in its main diagonal.
diag({2,4,6}) ¸
2 0 0
0 4 0
0 0 6
diag(
squareMatrix
) ⇒
⇒⇒
⇒
rowMatrix
Returns a row matrix containing the elements
from the main diagonal of
squareMatrix
.
squareMatrix
must be square.
[4,6,8;1,2,3;5,7,9] ¸
4 6 8
1 2 3
5 7 9
diag(ans(1)) ¸ [4 2 9]
Dialog CATALOG
Dialog
block
EndDlog
Generates a dialog box when the program is
executed.
block
can be either a single statement or a series
of statements separated with the “:” character.
Valid
block
options in the …I/O, 1:Dialog menu
item in the Program Editor are 1:Text, 2:Request,
4:DropDown, and 7:Title.
The variables in a dialog box can be given values
that will be displayed as the default (or initial)
value. If ¸ is pressed, the variables are
updated from the dialog box and variable ok is
set to 1. If Nis pressed, its variables are not
updated, and system variable ok is set to zero.
Program listing:
:Dlogtest()
:Prgm
:Dialog
:Title "This is a dialog box"
:Request "Your name",Str1
:Dropdown "Month you were born",
seq(string(i),i,1,12),Var1
:EndDlog
:EndPrgm
dim() MATH/Matrix/Dimensions menu
dim(
list
) ⇒
⇒⇒
⇒
integer
Returns the dimension of
list
.
dim({0,1,2}) ¸ 3
dim(
matrix
) ⇒
⇒⇒
⇒
list
Returns the dimensions of
matrix
as a two-
element list {rows, columns}.
dim([1,ë1,2;ë2,3,5]) ¸ {2 3}
dim(
string
) ⇒
⇒⇒
⇒
integer
Returns the number of characters contained in
character string
string
.
dim("Hello") ¸ 5
dim("Hello"&" there") ¸ 11