Texas Instruments TI-89 - 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
...
Me
d
Me
d
L
1
,L2
¸
Done
S
h
owStat
¸
¸
Regeq
(
x
)
!
y
1(
x
)
¸
Done
NewP
l
ot
1
,
1
,L
1
,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)
¸
"e
ll
o t
h
ere"
mid("Hello there",7,3)
¸
"t
h
e"
mid("Hello there",1,5)
¸
"He
ll
o"
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"}