| 摘要 |
PROBLEM TO BE SOLVED: To exactly grasp the size and position of a graph to be plotted in advance and to efficiently plot the graph as a result. SOLUTION: A number of scale acquisition means 24 acquires the number of first scales on an X coordinate axis and the number of second scales on a Y coordinate axis. An X coordinate value calculating means 26 calculates a second X coordinate value by multiplying the value obtd. by dividing the length of the X coordinate axis by the number of first scales, by the X coordinate values at the start and end points of plural segments constituting a polyonal line graph, and a Y coordinate value calculating means 28 calculates a second Y coordinate value by multiplying the value obtd. by dividing the length of the Y coordinate axis by the number of second scales, buy the Y coordinate values at the start and end points of plural segments. A graph plotting means 30 plots the graph by plotting the respective segments while specifying the positions of start and end points with respect to the X coordinate axis and the Y coordinate axis corresponding to these calculated X and Y coordinate values. |
