Texas Instruments TITANIUM TI-89 - Manual (Page 884)

884 Appendix A: Functions and Instructions
Style CATALOG
Style equanum, stylePropertyString
Sets the system graphing function equanum in the
current graph mode to use the graphing property
stylePropertyString .
equanum must be an integer from 1–99 and the
function must already exist.
stylePropertyString must be one of: " Line ", " Dot ",
" Square ", " Thick ", " Animate ", " Path ",
" Above ", or " Below ".
Note that in parametric graphing, only the xt half
of the pair contains the style information.
Valid style names vs. graphing mode:
Function: all styles
Parametric/Polar: line, dot, square, thick,
animate, path
Sequence: line, dot, square, thick
3D: none
Diff Equations:
line, dot, square, thick,
animate, path
Note: Capitalization and blank spaces are
optional when entering
stylePropertyString names.
Style 1,"thick" ¸ Done
Style 10,"path" ¸ Done
Note: In function graphing mode, these
examples set the style of
y1(x) to "Thick" and
y10(x) to "Path" .
subMat() CATALOG
subMat( matrix1 [, startRow ] [, startCol ] [, endRow ]
[, endCol ])
⇒ ⇒ ⇒ ⇒ matrix
Returns the specified submatrix of matrix1 .
Defaults: startRow =1, startCol =1, endRow =last
row, endCol =last column.
[1,2,3;4,5,6;7,8,9]! m1 ¸





 1 2 3
4 5 6
7 8 9
subMat(m1,2,1,3,2) ¸
[
4 5
7 8
]
subMat(m1,2,2) ¸
[
5 6
8 9
]
Sum (Sigma)
See G(), page 908.
sum() MATH/List menu
sum( list [ , start [ , end ]])
⇒ ⇒ ⇒ ⇒ expression
Returns the sum of the elements in list .
Start and end are optional. They specify a range of
elements.
sum({1,2,3,4,5}) ¸ 15
sum({a,2a,3a}) ¸ 6ø a
sum(seq(n,n,1,10)) ¸ 55
sum({1,3,5,7,9},3) ¸ 21
sum( matrix1 [ , start [ , end ]])
⇒ ⇒ ⇒ ⇒ matrix
Returns a row vector containing the sums of the
elements in the columns in
matrix1 .
Start and end are optional. They specify a range of
rows.
sum([1,2,3;4,5,6]) ¸ [5 7 9]
sum([1,2,3;4,5,6;7,8,9]) ¸
[12 15 18]
sum([1,2,3;4,5,6;7,8,9],2,3)
¸
[11,13,15]