Learning Guide Learning Guide

4.2 Graphing in Three Dimensions • 117Cylindrical CoordinatesSpecify a point in the cylindrical coordinate system using the threecoordinates r, θ, and z. Here r and θ are polar coordinates (see section 4.1)in the xy-plane and z is the usual Cartesian z-coordinate.Figure 4.3 The Cylindrical Coordinate Systemzx0θyrMaple plots functions in cylindrical coordinates with the cylinderplotcommand from the plots package.> with(plots):You can plot graphs in cylindrical coordinates by using the followingsyntax.cylinderplot( r-expr, angle=range, z=range )Here is a three-dimensional version of the spiral previously shown insection 4.1.> cylinderplot( theta, theta=0..4*Pi, z=-1..1 );