Texas Instruments TI89 Developer Guide - Page 723

Appendix A: System Routines - Lists and Matrices 681 push_cross_product Declaration: void push_cross_product (EStackIndex i, EStackIndex j) Category(ies): Lists and Matrices, Math Description: Computes the cross product of two vectors. Inputs: i, j - EStackIndexes of two vectors represented in one of three ways: both as lists, both as single row matrices, or both as single column matrices. Each must have either two elements or three elements. Outputs: Pushes onto the expression stack the cross product in the same form as the input. List input generates list output. Row matrix input generates row matrix output. Column matrix input generates column matrix output. Assumptions: Arguments must be in internal-tokenized form. External-tokenized form may cause an error throw. Side Effects: May expand expression stack, cause heap compression, or throw an error. Availability: On AMS 2.00 and higher. TI-89 / TI-92 Plus Differences: None See Also: None Example: /* If i is the EStackIndex of the internal-tokenized form of {1, a, b}, and j is the EStackIndex of the internal-tokenized form of {c, 2, 3}, then */ push_cross_product (i, j); /* pushes the internal-tokenized form of {3*a-2*b, b*c-3, 2-a*c} onto the expression stack. */ TI-89 / TI-92 Plus Developer Guide Not for Distribution Beta Version January 26, 2001