Texas Instruments TITANIUM TI-89 - Manual (Page 843)

Appendix A: Functions and Instructions 843
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"}