Texas Instruments PLUS TI-89 - Manual (Page 485)

468 Appendix A: Functions and Instructions
8992APPA.DOC TI-89 / TI-92 Plus: Appendix A (US English) Susan Gullord Revised: 02/23/01 1:48 PM Printed: 02/23/01 2:21 PM Page 468 of 132
MedMed MATH/Statistics/Regressions menu
MedMed list1 , list2 [ , [ list3 ] [, list4 , list5 ] ]
Calculates the median-median line and
updates all the system statistics variables.
All the lists must have equal dimensions
except for
list5 .
list1 represents xlist.
list2 represents ylist.
list3 represents frequency.
list4 represents category codes.
list5 represents category include list.
Note: list1 through list4 must be a variable
name or c1–c99 (columns in the last data
variable shown in the Data/Matrix Editor).
list5 does not have to be a variable name and
cannot be c1–c99.
In function graphing mode:
{0,1,2,3,4,5,6}! L1 ¸ {0 1 2 ...}
{0,2,3,4,3,4,6}! L2 ¸ {0 2 3 ...
MedMed L1,L2 ¸ Done
ShowStat ¸
¸
Regeq(x)! y1(x) ¸ Done
NewPlot 1,1,L1,L2 ¸ Done
¥ %
mid() MATH/String menu
mid( sourceString , start [, count ])
⇒
string
Returns count characters from character
string sourceString , beginning with character
number start .
If count is omitted or is greater than the
dimension of sourceString , returns all
characters from sourceString , beginning with
character number start .
count must be ‚ 0. If count = 0, returns an
empty string.
mid("Hello there",2) ¸
"ello there"
mid("Hello there",7,3) ¸
"the"
mid("Hello there",1,5) ¸
"Hello"
mid("Hello there",1,0) ¸
""
mid( sourceList , start [, count ]) ⇒
list
Returns count elements from sourceList ,
beginning with element number start .
If count is omitted or is greater than the
dimension of sourceList , returns all elements
from sourceList , beginning with element
number start .
count must be ‚ 0. If count = 0, returns an
empty list.
mid({9,8,7,6},3) ¸ {7 6}
mid({9,8,7,6},2,2) ¸ {8 7}
mid({9,8,7,6},1,2) ¸ {9 8}
mid({9,8,7,6},1,0) ¸ {}
mid( sourceStringList , start [, count ]) ⇒ list
Returns count strings from the list of strings
sourceStringList , beginning with element
number start .
mid({"A","B","C","D"},2,2) ¸
{"B" "C"}