Texas Instruments TI89 Developer Guide - Page 9

Table of Contents vii 14.4. Data Variable 150 14.5. Text Variable 151 14.6. String Variable 151 14.7. Graph Database 152 14.8. Bitmap PIC Images 156 14.9. Tokenized Programs and Functions 157 14.10. Programs and Functions in Text Format 159 14.11. Third Party Data 160 14.12. Assembly Program 160 15. Expressions and the Expression Stack 161 15.1. Overview ...161 15.2. Contiguous Tokenized Polish Representation 161 15.2.1. Tags ...162 15.2.2. Numbers...163 15.2.3. Variables, Units and Physical Constants 165 15.2.4. Other Constants 166 15.2.5. One-argument Tags 167 15.2.6. Two-argument Tags 167 15.2.7. Tags That Take More Than Two or a Variable Number of Arguments ...... 168 15.2.8. Lists and Matrices 169 15.2.9. Primary, Secondary, and Command Tags 169 15.2.10. User and Application Defined Functions and Programs 170 15.3. External Versus Internal Tokenized Polish 170 15.4. Most Main Ordering and Internal Representations of Exponentiation, Multiplication, and Addition 172 15.5. The Expression Stack 174 15.6. An Example of Working on the EStack 175 15.6.1. Estack Arguments and Results 176 15.6.2. Estack Calculations 177 15.7. Working With Lists 178 16. Working with Numbers 181 16.1. Overview ...181 TI-89 / TI-92 Plus Developer Guide Not for Distribution Beta Version January 26, 2001