Electronic device which renders graph, graph display method and recording medium in which graph rendering program is recorded

摘要

Disclosed is an electronic device including a display which displays an image, a graph graphic detection unit which detects a graph graphic matching any of predetermined graph shapes in the image, a graph rendering unit which renders a graph overlapping the graph graphic, a length input line segment designation unit which designates any one of line segments included in the image as a line segment subject to length input, a line segment length input unit which inputs a length of the line segment subject to length input, a point of origin setting unit which sets a point of origin of a coordinate system, a display range calculation unit which calculates a display range of the coordinate system, and a graph equation calculation unit which calculates a graph equation of the graph and displays a calculation result in the display.