Array theory in an APL environment

Author:

Hassitt A.1,Lyon L. E.1

Affiliation:

1. I. B. M. Scientific Center, 1530 Page Mill Road, Palo Alto, California

Abstract

Trenchard More has proposed an array theory which offers a powerful set of operators and operations on nested arrays. We have written a program called Array Theory/370 (AT/370) which implements these array theoretic operations at the assembler-language level on an IBM/370. We have also written a VS APL auxiliary processor which enables the APL user to access AT/370 and to manipulate nested arrays. This paper describes the simple but powerful APL-AT/370 interface and illustrates how the interface was used to build an interactive array-theoretic system.

Publisher

Association for Computing Machinery (ACM)

Reference11 articles.

1. “Extension of APL to tree-structured information”

2. Gull W. and Jenkins M. Recursive Data Structures in APL. C.A.C.M. volume 22 number 2 pages 79-96 February 1979. 10.1145/359060.359067 Gull W. and Jenkins M. Recursive Data Structures in APL. C.A.C.M. volume 22 number 2 pages 79-96 February 1979. 10.1145/359060.359067

3. Toward a data structure extension for APL

4. More T. A Theory of Arrays with Applications to Databases. I.B.M. Cambridge Scientific Center report G320-2106 September 1975. More T. A Theory of Arrays with Applications to Databases. I.B.M. Cambridge Scientific Center report G320-2106 September 1975.

5. More T. Types and Prototypes in a Theory of Arrays. I.B.M. Cambridge Scientific Center report 320-2112 May 1976. More T. Types and Prototypes in a Theory of Arrays. I.B.M. Cambridge Scientific Center report 320-2112 May 1976.

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