Accession Number : AD0693920

Title :   AN INTERACTIVE GRAPHIC SYSTEM FOR CURVE FITTING AND EDITING,

Corporate Author : RAND CORP SANTA MONICA CALIF

Personal Author(s) : Priver,A. S.

Report Date : SEP 1969

Pagination or Media Count : 86

Abstract : The system described here allows a user to enter a curve into an IBM 360/40 computer via a RAND Tablet, and interactively to specify various ways of fitting, editing and displaying the curve on an IBM 2250 scope. The system consists of a number of interconnected 'pages' on the 2250, by which the user can: (1) Enter curves by tracing them onto the Tablet. (2) Least-squares smooth the data points in various ways. (3) Consider various subsets of the data points. (4) Add, move, or delete individual data points via the Tablet stylus. (5) Fit data points by splines or least-squares polynomials of specified degree. Space curves are currently handled as parameterized pairs. (6) Comparatively display spline and least-squares fits. (7) Punch cards with data points or coefficients. Control is exclusively via Tablet stylus, using software-sensitized areas for pointing and a set of character recognition programs for alphanumeric inputs. (Author)

Descriptors :   (*INPUT OUTPUT DEVICES, CURVE FITTING), (*CURVE FITTING, COMPUTER PROGRAMMING), LEAST SQUARES METHOD, INTERACTIONS, CORRECTIONS, DIGITAL COMPUTERS, GRAPHICS

Subject Categories : Computer Programming and Software
      Computer Hardware

Distribution Statement : APPROVED FOR PUBLIC RELEASE