Texas Instruments TI-86 Manual Book page 330

318
Chapter 20: A to Z Function and Instruction Reference
log
<
LU(
MATRX MATH menu
LnR
Uses xStat , yStat , and
equation to RegEq only.
log number or log ( expression
Returns the logarithm of a real or complex number or
expression, where:
logarithm
10 = number
log list
Returns a list in which each element is the logarithm of
the corresponding element in list.
LU( matrix , lMatrixName ,
Calculates the Crout LU (lower-upper) decomposition
of a real or complex matrix. The lower triangular
matrix is stored in lMatrixName, the upper triangular
matrix in uMatrixName, and the permutation matrix
(which describes the row swaps done during the
calculation) in pMatrixName.
lMatrixName ¹ uMatrixName = pMatrixName ¹ matrix
fStat , and stores the regression
)
uMatrixName , pMatrixName
log 2 b
log (36.4/3) b
In complex number mode:
RectC
log (3,4) b
(.698970004336,.4027...
In RectC complex number mode:
3,2} b
L
log {
{(.47712125472,1.364...
)
[[6,12,18][5,14,31][3,8,18]]
¶MAT b
LU(MAT,L,U,P) b
L b
U b
P b
.301029995664
1.08398012893
[[6 12 18]
[5 14 31]
[3 8 18]]
Done
[[6 0 0]
[5 4 0]
[3 2 1]]
[[1 2 3]
[0 1 4]
[0 0 1]]
[[1 0 0]
[0 1 0]
[0 0 1]]