Texas Instruments TI-89 User Manual - Page 866

rotate(string1[,#ofRotations]) ⇒ string Returns a copy of string1 rotated right or left by #of Rotations characters. Does not alter string1. If #of Rotations is positive, the rotation is to the left. If #of Rotations is negative, the rotation is to the right. The default is ë 1 (rotate right one character). rotate("abcd") ¸ rotate("abcd",ë2) ¸ rotate("abcd",1) ¸ "dabc" "cdab" "bcda" round( ) MATH/Number menu round(expression1[, digits]) ⇒ expression Returns the argument rounded to the specified number of digits after the decimal point. digits must be an integer in the range 0-12. If digits is not included, returns the argument rounded to 12 significant digits. Note: Display digits mode may affect how this is displayed. round(list1[, digits]) ⇒ list Returns a list of the elements rounded to the specified number of digits. round(matrix1[, digits]) ⇒ matrix Returns a matrix of the elements rounded to the specified number of digits. round(1.234567,3) ¸ 1.235 round({p,‡(2),ln(2)},4) ¸ {3.1416 1.4142 .6931} round([ln(5),ln(3);p,e^(1)],1) ¸ [13..61 12..17] rowAdd( ) MATH/Matrix/Row ops menu rowAdd(matrix1, rIndex1, rIndex2) ⇒ matrix Returns a copy of matrix1 with row rIndex2 replaced by the sum of rows rIndex1 and rIndex2. rowAdd([3,4;ë 3,ë 2],1,2) ¸ [ ] 3 4 0 2 rowAdd([a,b;c,d],1,2) ¸ [aa+c bb+d] rowDim( ) MATH/Matrix/Dimensions menu rowDim(matrix) ⇒ expression Returns the number of rows in matrix. Note: See also colDim(). [1,2;3,4;5,6]! M1 ¸ rowdim(M1) ¸ 13 24 5 6 3 rowNorm( ) MATH/Matrix/Norms menu rowNorm(matrix) ⇒ expression rowNorm([-5,6,-7;3,4,9;9,-9,-7]) Returns the maximum of the sums of the absolute ¸ 25 values of the elements in the rows in matrix. Note: All matrix elements must simplify to numbers. See also colNorm(). 866 Appendix A: Functions and Instructions