Patent ID: 8542254

Claim:
A graph display control apparatus comprising: a dot-matrix display unit; a graph display control unit which performs display control of a plurality of graphs on the display unit; a characteristic point computing unit which calculates a characteristic point on an arbitrary graph displayed on the display unit according to a user operation; a display determination unit which 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 characteristic point on the graph calculated by the characteristic point computing unit, 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-axis direction from the characteristic point; and an enlarged display control unit which, when the display determination unit has 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.