CS 1371 Lecture Notes - Lecture 12: Quadratic Equation
26 Jul 2016
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Note: you should be familiar with the material from the plotting guide. Rather than define an equation in terms of x and y (where y depends on x), we can define some function v that depends on some parameter u. This is to prevent confusion between the variable names and the axis on which the graph is plotted. Consider the quadratic equation with parameter u: v = u. ^2; In this example, we have two variables (2d). The variable u is independent and is called the parameter. Prior to evaluating the equation for v, we must set up a range of values for u: u = -10:0. 1:10; v = u. ^2; We now have two vectors, u and v that can be considered coordinate pairs (not necessarily x and y) that define points. We can plot these on the x-y plane using a standard plot() command: Now consider u and v as coordinate pairs for the x-z plane.
