Maple 9 Learning Guide - Maplesoft

3.1 The Maple solve Command • 49> eval( [x,y,z], s2 );[− 52713 − 7 t − 28 635 70u, + 12 t + u, −7013 13 13 13 − 7 t − 5913 u]This command fixed the order and extracted the right-hand side ofthe equations. Because the order is fixed, you know the solution for eachvariable. This capability is particularly useful if you want to plot thesolution surface.> plot3d(%, u=0..2, t=0..2, axes=BOXED);–5–10–15–20–2550 55 60 65 70 75 80–56–58–52–54–48–50–44–46–42The unapply CommandFor convenience, define x = x(u, t), y = y(u, t), and z = z(u, t), thatis, convert the solutions to functions. Recall that you can easily select asolution expression for a particular variable using eval.> eval( x, s2 );− 52713 − 7 t − 2813 uHowever, this is an expression for x and not a function.> x(1,1);x(1, 1)To convert the expression to a function, use the unapply command.Provide unapply with the expression and the independent variables. Forexample,