コンピュータ言語APLのポケコンHP-28S上でのシュミレーション

概要

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An attempt to simulate APL on the low-priced pocket computer HP-28S is given here. The HP-28S is an Advanced Programmable Scientific Computer based on a mathematical logic known as "Reverse Polish Notations (RPN)" and enables us to perform matirix calculation directly. Its performance looks like APL. The author has an attempt to simulate APL on this HP-28S pocket computer. Examples of the simulations are displayed along the introductory textbooks of APL, for examples, K. E. Iverson's booklets "APL in Exposition (1976)" and "Introducing APL to Teachers (1976)". The operations tried are the basic functions of APL : Plus, Negatives, Minus, Signum, Times, Reciprocal, Divide, Ceiling, Floor, Maximum, Minimum, Grade-up and down, Magnitude, Residues, Integers, Fractions, Size, Reshape, Ravel, Catenate, Index, Take, Drop, Compress, Expand, Reverse, Rotate, Transpose, Membership, Domino, Outer Products etc. At the end of this article, a brief program of single line for statistics is illustrated. The author's idea may be useful to teach the basic functions of APL and also to design some small and educational systems of APL on a personal computer.