Graph display control apparatus and graph display control method

A graph display control apparatus comprising:

• a dot-matrix display unit;
• an input unit;
• and
• a processor which:
• performs display control of a plurality of graphs on the display unit,
• calculates a characteristic point on an arbitrary graph displayed on the display unit according to an input from the input unit,
• determines (i) whether another graph displayed on the display unit is within a first range of a preset number of dots in a Y-axis direction about a display dot of the calculated characteristic point on the graph, and (ii) whether the another graph displayed on the display unit is within a second range of the preset number of dots in the Y-axis direction about a display dot on the graph shifted by one dot in an X-direction from the characteristic point, and
• when it has been determined that the another graph is within the first range and the second range, performs enlarged display control of said plurality of graphs displayed on the display unit including the characteristic point until the another graph is no longer within one of the first range and the second range.

A method of performing display control of graphs with a computer having a dot-matrix display unit, the method comprising:

• performing display control of a plurality of graphs on the display unit;
• calculating a characteristic point on an arbitrary graph displayed on the display unit according to a user operation;
• determining (i) whether another graph displayed on the display unit is within a first range of a preset number of dots in a Y-axis direction about a display dot of the calculated characteristic point on the graph, and (ii) whether the another graph displayed on the display unit is within a second range of the preset number of dots in the Y-axis direction about a display dot on the graph shifted by one dot in an X-direction from the characteristic point;
• and
• when it has been determined that the another graph is within the first range and the second range, performing enlarged display control of said plurality of graphs displayed on the display unit including the characteristic point until the another graph is no longer within one of the first range and the second range.