Texas Instruments TI-89 User Manual - Page 855

PowerReg MATH/Statistics/Regressions menu PowerReg list1, list2[, [list3] [, list4, list5]] Calculates the power regression 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: {1,2,3,4,5,6,7}! L1 ¸ {1,2,3,4,3,4,6}! L2 ¸ PowerReg L1,L2 ¸ ShowStat ¸ ¸ Regeq(x)"y1(x) ¸ NewPlot 1,1,L1,L2 ¸ ¥% {1 2 3 ...} {1 2 3 ...} Done Done Done Prgm CATALOG Prgm © EndPrgm Required instruction that identifies the beginning of a program. Last line of program must be EndPrgm. Program segment: :prgmname() :Prgm : :EndPrgm Product (PI) See Π(), page 908. product( ) MATH/List menu product(list[, start[, end]]) ⇒ expression Returns the product of the elements contained in list. Start and end are optional. They specify a range of elements. product(matrix1[, start[, end]]) ⇒ matrix Returns a row vector containing the products of the elements in the columns of matrix1. Start and end are optional. They specify a range of rows. product({1,2,3,4}) ¸ 24 product({2,x,y}) ¸ 2ø xø y product({4,5,8,9},2,3) ¸ 40 product([1,2,3;4,5,6;7,8,9]) ¸ [28 80 162] product([1,2,3;4,5,6;7,8,9], 1,2) ¸ [4,10,18] Prompt CATALOG Prompt var1[, var2] [, var3] ... Displays a prompt on the Program I/O screen for each variable in the argument list, using the prompt var1?. Stores the entered expression in the corresponding variable. Prompt must have at least one argument. Program segment: © Prompt A,B,C © EndPrgm Appendix A: Functions and Instructions 855