Texas Instruments TI-86 - Manual (Page 360)

348
Chapter 20: A to Z Function and Instruction Reference
20ATOZ.DOC TI-86, Chap 20, US English Bob Fedorisko Revised: 02/13/01 2:42 PM Printed: 02/13/01 3:05 PM Page 348 of 118
round(
MATH NUM menu
round( number , #ofDecimals )
round( number )
Returns a real or complex number rounded to the
specified #ofDecimals (0 to 11). If #ofDecimals is
omitted, number is rounded to 12 decimal places.
round( p,4) b 3.1416
round( p/4,4) b .7854
round( p/4) b .785398163397
round( list , #ofDecimals )
round( matrix , #ofDecimals )
round( vector , #ofDecimals )
Returns a list, matrix, or vector in which each element
is the rounded value of the corresponding element in
the argument. #ofDecimals is optional.
round({ p,‡2,ln 2},3) b
{3.142 1.414 .693}
round([[ln 5,ln 3][ p,e^1]],2)
b [[1.61 1.1 ]
[3.14 2.72]]
rref
MATRX OPS menu
rref matrix
Returns the reduced row-echelon form of a real or
complex matrix. The number of columns must be
greater than or equal to the number of rows.
[[4,5,6][7,8,9]]¶MAT b
[[4 5 6]
[7 8 9]]
rref MAT b
[[1 0 L .999999999999…
[0 1 2 …
rSwap(
MATRX OPS menu
rSwap( matrix , rowA , rowB )
Returns a matrix with rowA of a real or complex matrix
swapped with rowB.
[[5,3,1][2,0,4][3, L 1,2]]¶MAT
b [[5 3 1]
[2 0 4]
[3 L 1 2]]
rSwap(MAT,2,3) b
[[5 3 1]
[3 L 1 2]
[2 0 4]]