Texas Instruments TI-92+ User Manual

{e
1,1,1
e
1,1,2
e
1,2,1
e
1,2,2
e
2,1,1
e
2,1,2
e
2,2,1
e
2,2,2
}
For a particular element location {a
1
, a
2
, a
3
}, we can find the corresponding list element index k from
[1]
k = a
3
+ a
2
− 1 d
3
+ a
1
− 1 d
2
d
3
This can be expanded and factored to eliminate one multiply, and access each variable only once, like
this:
[2]
k = d
3
d
2
a
1
− 1
+ a
2
− 1 + a
3
The routines to save and recall elements to a 3-dimensional array are called m3sto() and m3rcl().
m3sto() looks like this:
m3sto(v,l,d,m)
Func
©(value,location{},dim{},matrix{})
©Store value in 3D matrix
©12oct00 dburkett@infinet.com
v→m[d[3]*(d[2]*(l[1]-1)+l[2]-1 )+l[3]]
m
EndFunc
where
v is the value to store in the array
l is a 3-element list that specifies the element location as {a
1
, a
2
, a
3
}
d is a 3-element list that specifies the list dimensions as {d
1
, d
2
, d
3
}
m is the array list or the name of the array list
m3sto() returns the original array m with value v stored at location l.
For example, if we want to put 7 at location {1,2,3} in array mat1, which has dimensions 2 x 3 x 4, then
use this:
m3sto(7,{1,2,3},{2,3,4},mat1)→mat1
To recall an array element, use m3rcl():
m3rcl(l,d,m)
Func
©(location{},dim{},matrix{})
©Recall element from 3D matrix
©12oct00 dburkett@infinet.com
m[d[3]*(d[2]*(l[1]-1)+l[2]-1)+l[3]]
EndFunc
where
l is a 3-element list that specifies the element location as {a
1
, a
2
, a
3
}
3 - 11

Texas Instruments TI-92+ Specifications

General

Type	Graphing Calculator
Display Type	LCD
Processor	Motorola 68000
Operating System	TI-OS
Programming	TI-BASIC, Assembly
Memory	128 KB RAM
Storage	Flash ROM
Power Supply	4 AAA batteries