MATLAB Lecture 8 School of Mathematical Sciences Xiamen Univer http://gdjpkc.xmu.edu.cn MATLAB Lecture 8-Graphics-Curve 绘图 Ref: MATLAB- Graphics- Basic Plotting Commands Vocabulary: plot绘图 轴 display显示 annotate注释 curve/ curved line曲线 explicit显式 implicit隐式 parameter参数 polar coordinates极坐标 boldface黑体 grid网格 tite标题 figure图形 legend图例 radian 弧度 radius半径 ● Some functions plot ezplot polar plot title xlabel ylabel *figure biplot grid on *grid off ● Graphics MATLAB provides a variety of functions for displaying vector data as line plots, as well as functions for annotating and printing these graphs t The representation of curve and surface The representation of curve on plane Explicit scheme y=f(x) Implicit formula: F(x, y)=0 x=x(1) Parameter representation Polar coordinates representation: p=f(e) Tabulation, say table of trigonometric function, experimental data etc Figure, say sine curve, experimental curve etc The representation of curve in space Explicit scheme: z=f(x,y) Implicit formula: F(x, y, z)=0 x=x(u, v) Parameter representation: y=y(u, v) (,v) Data form,x={x},y={y},z={n},=1,2,…,m,j=1,2,…,nMATLAB Lecture 8  School of Mathematical Sciences Xiamen University  http://gdjpkc.xmu.edu.cn  Lec8­1 MATLAB Lecture 8 ­ Graphics ­ Curve 绘图 Ref: MATLAB→Graphics→Basic  Plotting  Commands l Vocabulary: plot  绘图 x­axis x 轴 display  显示 annotate 注释 curve/curved line  曲线 explicit 显式 implicit 隐式 parameter 参数 polar coordinates  极坐标 boldface 黑体 grid  网格 title 标题 figure 图形 legend  图例 radian  弧度 radius  半径 l Some functions plot  ezplot  polar plot3  title xlabel  ylabel  *figure *legend *subplot  *grid on *grid off l Graphics MATLAB provides a variety of functions for displaying vector data as line plots, as well as  functions for annotating and printing these graphs.  ² The representation of curve and surface ¸ The representation of curve on plane Explicit scheme: y = f(x) Implicit formula: F(x,y) = 0  Parameter representation:  ( ) ( ) x x t  y y t Ï = Ì Ó = Polar coordinates representation:  r = f (q ) Tabulation, say table of trigonometric function, experimental data etc.  Figure, say sine curve, experimental curve etc.  ¸ The representation of curve in space Explicit scheme: z = f(x,y) Implicit formula: F(x,y,z) = 0  Parameter representation:  ( , ) ( , ) ( , ) x x u v  y y u v  z z u v Ï = Ô Ì = Ô = Ó Data form,  { }, { }, { }, 1, 2,..., , 1, 2,..., i j ij x = x y = y z = z i = m j = n .  Graphics