| 摘要 |
PURPOSE: To easily recognize the relation among plural graphs to be displayed regardless of the presence of graphs then)selves by displaying the graphs and the information on the relation among graphs displayed by a graph display means. CONSTITUTION: When a graph mode is set by the operation of a mode key 12b of a key input part 12, two relational expressions to be graphed are inputted by the operation of an alphanumeric key 12a or these two relational expressions are selected out of those relational expressions which are stored in an expression register included in a RAM 14. When an execution key 12f is operated, the graph drawing data on each relational expression are produced by calculation and displayed in graphs on a liquid crystal display part 16. At the same time, the relation between two graphs is decided as the orthogonal, parallel, symmetrical or crossing state and then displayed with two graphs as the inter-graph relation information including the orthogonal coordinates, the inter-parallel distance, etc. |
