jurjen@cwi.nl (Jurjen NE Bos) (06/30/90)
The manual doesn't say very much about the CONIC plot, but it is a lot more useful than they claim. The truth is: CONIC plot will plot any curve in variables X (independent) and Y (dependent) as long as Y occurs in the equation as a polynomial of degree two. This means that the degree of X does not matter at all! In fact, the calculator will just do 'Y' QUAD on the equation, and plot the two curves you get when -1 and +1 is substituted for s1. If the result is complex, nothing is plotted. This means it will do something if Y occurs in a degree higher than two, but not what you want! A nice example is the strophoid, a cubic curve: '(A+X)*SQ(Y)=(A_X)*SQ(X)' Suggested value for A is 5. (Default PPAR, don't forget the plot type!) By the way, isn't it a "bug" that the Right shift is bLue and the Left shift is Red? -- | | "Never imagine yourself not to be otherwise than what | | Jurjen N.E. Bos | it might appear to others that what you were or might | | | have been was not otherwise than what you had been | | jurjen@cwi.nl | would have appeared to them to be otherwise." |