Electronic device having graph display function in which user can set coefficient variation range for fine coefficient value adjustment, and graph display method, and storage medium storing graph display control process program having the same

• US 9,805,485 B2
• Filed: 12/23/2014
• Issued: 10/31/2017
• Est. Priority Date: 12/27/2013
• Status: Active Grant

• Current Assignee: Casio Computer Company Limited
• Original Assignee: Casio Computer Company Limited
• Inventors: Endo, Kota
• Primary Examiner(s): Cobb, Michael J
• Application Number:
  US14/582,129
• Publication Number:
  US 20150187106A1
• Time in Patent Office: 1,043 Days
• Field of Search: None
• CPC Class Codes: G06T 11/206 Drawing of charts or graphs

Abstract

A graph display control apparatus displays a first operation display element for varying, within a preset range, a value of a coefficient included in a function expression; displays a graph image corresponding to the function expression based on the value of the coefficient which is varied in accordance with a user operation of the first operation display element; designates, in accordance with a user operation, a partial variation range of the set variation range of the value of the coefficient; displays a second operation display element for varying the value of the coefficient within the designated partial variation range of the value of the coefficient; and re-displays the graph image displayed based on the value of the coefficient which is varied in accordance with a user operation of the second operation display element.

Claims

1. An electronic device comprising:

a display; and

a processor which is configured to;

display a function expression including a coefficient on the display;

display a main graph image which represents the function expression on the display;

obtain a second variation range determined by a second minimum value and a second maximum value included in a first variation range determined by a preset first minimum value and a preset first maximum value in accordance with a user operation;

display on the display an operation display element for varying a value of the coefficient;

vary the value of the coefficient within the second variation range in accordance with a user operation of the operation display element; and

change the main graph image displayed on the display to a changed main graph image which represents a changed function expression obtained by substituting the value of the coefficient varied in accordance with the user operation of the operation display element into the function expression, and display the changed main graph image,

wherein obtaining the second variation range in accordance with the user operation comprises;

displaying an image indicating a variation range of the main graph image in accordance with the user operation; and

obtaining the second minimum value for displaying a first graph image that is tangent to the image indicating the variation range of the main graph image and the second maximum value for displaying a second graph image that is tangent to the image indicating the variation range of the main graph image, as the second variation range, and

wherein the processor is further configured to display the first graph image that is tangent to the image indicating the variation range of the main graph image and the second graph image that is tangent to the image indicating the variation range of the main graph image.

2. The electronic device of claim 1, wherein the processor is further configured to:

display on the display a first range operation display element for varying the value of the coefficient within the first variation range; and

vary the value of the coefficient within the first variation range in accordance with a user operation of the first range operation display element,

wherein obtaining the second variation range in accordance with the user operation comprises;

obtaining, when the value of the coefficient varied in accordance with the user operation of the first range operation display element was increased or decreased in one direction and was then decreased or increased in the other direction, a range of the increase/decrease as the second variation range.

3. The electronic device of claim 1, wherein displaying the image indicating the variation range of the main graph image comprises displaying a range on the main graph image displayed on the display, which is circled in accordance with a user operation, as an image indicating the second variation range.

4. The electronic device of claim 1, wherein displaying the image indicating the variation range of the main graph image comprises:

displaying a circle of a size corresponding to a touch time or touch strength of a touch operation of a user for any one of positions of the main graph image displayed on the display around the position as the image indicating the second variation range.

5. The electronic device of claim 1, wherein varying the value of the coefficient within the second variation range in accordance with the user operation comprises:

varying, when a value of the coefficient, at which the main graph image displayed becomes a characteristic point, is included in the second variation range of the value of the coefficient which is variable by the operation display element, the current value of the coefficient to the value of the coefficient, at which the main graph image becomes the characteristic point, in accordance with a user operation of the operation display element.

6. The electronic device of claim 1, wherein the processor is further configured to:

display, when a value of the coefficient, at which the main graph image displayed becomes a characteristic point, is included in the second variation range of the value of the coefficient which is variable by the operation display element, a mark at a position of the value of the coefficient of the operation display element, at which the main graph image becomes the characteristic point.

7. A method for displaying a graph image by controlling a computer of an electronic device including a display, the method comprising controlling the computer to execute functions comprising:

displaying a function expression including a coefficient on the display;

displaying a main graph image which represents the function expression on the display;

obtaining a second variation range determined by a second minimum value and a second maximum value included in a first variation range determined by a preset first minimum value and a preset first maximum value in accordance with a user operation;

displaying on the display an operation display element for varying a value of the coefficient;

varying the value of the coefficient within the second variation range in accordance with a user operation of the operation display element; and

changing the main graph image displayed on the display to a changed main graph image which represents a changed function expression obtained by substituting the value of the coefficient varied in accordance with the user operation of the operation display element into the function expression and displaying the changed main graph image,

wherein obtaining the second variation range in accordance with the user operation comprises;

displaying an image indicating a variation range of the main graph image in accordance with the user operation; and

obtaining the second minimum value for displaying a first graph image that is tangent to the image indicating the variation range of the main graph image and the second maximum value for displaying a second graph image that is tangent to the image indicating the variation range of the main graph image, as the second variation range, and

wherein the method further comprises controlling the computer to execute functions comprising;

displaying the first graph image that is tangent to the image indicating the variation range of the main graph image and the second graph image that is tangent to the image indicating the variation range of the main graph image.

8. The method of claim 7, further comprising controlling the computer to execute functions comprising:

displaying on the display a first range operation display element for varying the value of the coefficient within the first variation range; and

varying the value of the coefficient within the first variation range in accordance with a user operation of the first range operation display element,

wherein obtaining the second variation range in accordance with the user operation comprises;

obtaining, when the value of the coefficient varied in accordance with the user operation of the first range operation display element was increased or decreased in one direction and was then decreased or increased in the other direction, a range of the increase/decrease as the second variation range.

9. The method of claim 7, wherein displaying the image indicating the variation range of the main graph image comprises displaying a range on the main graph image displayed on the display, which is circled in accordance with a user operation, as an image indicating the second variation range.

10. The method of claim 7, wherein displaying the image indicating the variation range of the main graph image comprises:

displaying a circle of a size corresponding to a touch time or touch strength of a touch operation of a user for any one of positions of the main graph image displayed on the display around the position as the image indicating the second variation range.

11. The method of claim 7, wherein varying the value of the coefficient within the second variation range in accordance with the user operation comprises:

varying, when a value of the coefficient, at which the main graph image displayed becomes a characteristic point, is included in the second variation range of the value of the coefficient which is variable by the operation display element, the current value of the coefficient to the value of the coefficient, at which the main graph image becomes the characteristic point, in accordance with a user operation of the operation display element.

12. The method of claim 7, further comprising controlling the computer to execute functions comprising:

displaying, when a value of the coefficient, at which the main graph image displayed becomes a characteristic point, is included in the second variation range of the value of the coefficient which is variable by the operation display element, a mark at a position of the value of the coefficient of the operation display element, at which the main graph image becomes the characteristic point.

13. A non-transitory computer-readable storage medium having stored thereon a program for controlling a computer of an electronic device including a display, the program controlling the computer to execute functions comprising:

displaying a function expression including a coefficient on the display;

displaying a main graph image which represents the function expression on the display;

obtaining a second variation range determined by a second minimum value and a second maximum value included in a first variation range determined by a preset first minimum value and a preset first maximum value in accordance with a user operation;

displaying on the display an operation display element for varying a value of the coefficient;

varying the value of the coefficient within the second variation range in accordance with a user operation of the operation display element; and

changing the main graph image displayed on the display to a changed main graph image which represents a changed function expression obtained by substituting the value of the coefficient varied in accordance with the user operation of the operation display element into the function expression and displaying the changed main graph image,

wherein obtaining the second variation range in accordance with the user operation comprises;

displaying an image indicating a variation range of the main graph image in accordance with the user operation; and

obtaining the second minimum value for displaying a first graph image that is tangent to the image indicating the variation range of the main graph image and the second maximum value for displaying a second graph image that is tangent to the image indicating the variation range of the main graph image, as the second variation range, and

wherein the program further controls the computer to execute functions comprising;

displaying the first graph image that is tangent to the image indicating the variation range of the main graph image and the second graph image that is tangent to the image indicating the variation range of the main graph image.

14. The non-transitory computer-readable medium of claim 13, wherein the program further controls the computer to execute functions comprising:

displaying on the display a first range operation display element for varying the value of the coefficient within the first variation range; and

varying the value of the coefficient within the first variation range in accordance with a user operation of the first range operation display element,

wherein obtaining the second variation range in accordance with the user operation comprises;

obtaining, when the value of the coefficient varied in accordance with the user operation of the first range operation display element was increased or decreased in one direction and was then decreased or increased in the other direction, a range of the increase/decrease as the second variation range.

15. The non-transitory computer-readable medium of claim 13, wherein displaying the image indicating the variation range of the main graph image comprises displaying a range on the main graph image displayed on the display, which is circled in accordance with a user operation, as an image indicating the second variation range.

16. The non-transitory computer-readable medium of claim 13, wherein displaying the image indicating the variation range of the main graph image comprises:

displaying a circle of a size corresponding to a touch time or touch strength of a touch operation of a user for any one of positions of the main graph image displayed on the display around the position as the image indicating the second variation range.

17. The non-transitory computer-readable medium of claim 13, wherein varying the value of the coefficient within the second variation range in accordance with the user operation comprises:

varying, when a value of the coefficient, at which the main graph image displayed becomes a characteristic point, is included in the second variation range of the value of the coefficient which is variable by the operation display element, the current value of the coefficient to the value of the coefficient, at which the main graph image becomes the characteristic point, in accordance with a user operation of the operation display element.

18. The non-transitory computer-readable medium of claim 13, wherein the program further controls the computer to execute functions comprising:

displaying, when a value of the coefficient, at which the main graph image displayed becomes a characteristic point, is included in the second variation range of the value of the coefficient which is variable by the operation display element, a mark at a position of the value of the coefficient of the operation display element, at which the main graph image becomes the characteristic point.