1. An electronic computing apparatus having a graph displaying function for displaying a graph on graph displaying means on the basis of data for displaying the graph, the electronic computing apparatus comprising: quadrant selection table displaying means for displaying a quadrant selection table; quadrant selecting means for selecting a quadrant of the graph displayed on the graph displaying means; scale selecting means for selecting a scale of the graph displayed on the graph displaying means; and display control means for displaying again a part of the graph in the quadrant selected by the quadrant selecting means with the scale selected by the scale selecting means on the graph displaying means.