MINIATURE ELECTRIC CALCULATOR HAVING GRAPHIC DISPLAY FUNCTION

摘要

PURPOSE:To display the elevation angle of an optional point with an X axis at an origin by indicating the optional point on a graph in a display part and calculating the elevation angle of the optional point against the X axis of coordinates at the origin of coordinates from the coordinate data of the point and the origin of the coordinates. CONSTITUTION:After it is decided that a theta key 11g is in a depressed state, a count up signal is inputted from a control part 12 to a counter 22 and an operation that the counting value is incremented by every 0.01 is repated. In a state that the theta key 11g is not depressed, according to the counting value of the counter 22, a display part 21 is made display a line segment representing the elevation angle against the X axis at the origin so as to increase the elevation angle gradually with the character 'theta=A' that becomes the numeric value data of the elevation angle. And with ceasing the depressing operation of the theta key 11g at a time when the counting value of the counter 22 is coincided with the angle of an indicated coordinate point, the counting value at the time is inputted to an A register 18a and displayed as a character. Thereby, only with a simple operation, the angle formed with the optional point on the graph, the origin and the axis of the coordinates can be easily displayed.