Function calculator with graphic chart facility

Details Function calculator with graphic chart facility Function calculator with graphic chart facility

1996-10-31

1998-10-20

Nguyen, Matthew V.

Registers

Calculators

Tabular

36471001, G06C 300, G06F 300

Patent

active

058250018

ABSTRACT:
In tracing a functional equation, a maximum value of the functional equation and an intersection with another functional equation can be recognized on a graph of the functional equation. Coordinate values of any traced dot may include an intersection point discriminated to be a true intersection point or not. An intersection point between dots to be traced, can be traced with the trace interval changed to be finer than the display interval. The tracing cursor indicates specific points by a change in a color and/or shape of the cursor. A point intersection between different functions is determined on the basis of a difference value between traced values of respective functions.

REFERENCES:
patent: 4794554 (1988-12-01), Tamiya
patent: 4908786 (1990-03-01), Kuno
patent: 5210708 (1993-05-01), Negishi
patent: 5303338 (1994-04-01), Handa et al.
patent: 5539867 (1996-07-01), Handa et al.

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