Texas Instruments TI-89 Voyage 200, User Manual

Page: 843 / 1008

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"}