Storage medium storing graph drawing program and server

Patent metadata

Field	Value
Publication number	US-12573104-B2
Application number	US-202418640774-A
Country	US
Kind code	B2
Filing date	Apr 19, 2024
Priority date	Dec 16, 2021
Publication date	Mar 10, 2026
Grant date	Mar 10, 2026

Abstract

A non-transitory storage medium stores a graph drawing program for causing a computer to execute acquiring a plot point of a first graph by a handwriting input, regressively calculating a plurality of graph data by a plurality of regression models, based the acquired plot point, performing first determination to determine, in regard to each of the graph data, whether at least a partial data element is included in a predetermined range of coordinates, performing second determination to determine graph data having a good regression accuracy among the plurality of graph data, selecting one of the graph data, based on a result of the first determination and a result of the second determination and drawing a second graph in place of the first graph, based on the selected graph data.

First claim

What is claimed is:

1 . A computer-readable non-transitory storage medium storing a graph drawing program for causing a computer to execute:
acquiring a plot point of a first graph by a handwriting input; regressively calculating a plurality of graph data by a plurality of regression models, based the acquired plot point; performing first determination to determine, in regard to each of the graph data, whether at least a partial data element is included in a predetermined range of coordinates; performing second determination to determine graph data having a good regression accuracy among the plurality of graph data; selecting one of the graph data, based on a result of the first determination and a result of the second determination; and drawing a second graph in place of the first graph, based on the selected graph data.

2 . The storage medium of claim 1 , wherein the selecting one of the graph data includes selecting graph data, with respect to which the first determination determines that the at least the partial data element is included in the predetermined range of coordinates, and which is determined in the second determination to have the good regression accuracy.

3 . The storage medium of claim 1 , wherein the selecting one of the graph data includes selecting graph data that is determined to have a best regression accuracy in the second determination performed for all of the graph data, in a case where there is no graph data with respect to which the first determination determines that the at least the partial data element is included in the predetermined range of coordinates.

4 . The storage medium of claim 1 , wherein the range of coordinates is set based on a graph expression that is input in advance.

5 . The storage medium of claim 4 , wherein the range of coordinates is set by using, as a reference point, a feature point in a graph represented by the graph expression.

6 . The storage medium of claim 5 , wherein the feature point includes at least one of an intersection with an abscissa axis in the graph represented by the graph expression, an extreme point, and an infinite point.

7 . The storage medium of claim 1 , wherein the range of coordinates is manually set based on a graph represented by a graph expression that is input in advance.

8 . A server comprising a processor including hardware configured to:
acquire a plot point of a first graph by a handwriting input; regressively calculate a plurality of graph data by a plurality of regression models, based the acquired plot point; perform first determination to determine, in regard to each of the graph data, whether at least a partial data element is included in a predetermined range of coordinates; perform second determination to determine graph data having a good regression accuracy among the plurality of graph data; select one of the graph data, based on a result of the first determination and a result of the second determination; and draw a second graph in place of the first graph, based on the selected graph data.

Assignees

• Casio Computer Co Ltd

Inventors

• Ono Manato

Classifications

• G09B7/02

  of the type wherein the student is expected to construct an answer to the question which is presented or wherein the machine gives an answer to the question presented by a student · CPC title

• G06F3/04883

  for inputting data by handwriting, e.g. gesture or text · CPC title

• G06Q50/20

  Education · CPC title

• G09B7/00

  Electrically-operated teaching apparatus or devices working with questions and answers (mechanically operated G09B3/00; computing arrangements G06F) · CPC title

• G06T11/20

  Drawing from basic elements · CPC title