MATLAB Lecture 9 School of Mathematical Sciences Xiamen University tp: /gdjpkc. xmu. edu.cn MATLAB Lecture 9-Graphics-Surface 绘图 Ref: MATLAB-+3-D Visualization- Creating 3-D Graphs Vocabulary: plot绘图 surface曲面 mesh网格 grid格子 llustrate图解 region区域 polygon多边形 ak顶点 记号 helⅸx螺旋 magenta洋红色 cyan青色 gray灰色 aquamarine碧绿色 ● Some functions Plot3 mesh surf meshgrid fill3 fill *axis square *cylinder *sphere * comet ●3- D Graphs ◆ A Typical3- D Graph This table illustrates typical steps involved in producing 3-D scenes containing either data graphs or models of 3-D ep 1. Prepare your data Z= peaks(20) 2. Select window and position plot region figure(1) within windo subplot(2, 1, 2) 3. Call 3-D graphing function h=surf(z) 4. Set colormap and shading algorithm colormap hot shading interp set(h, Edge Color, k) 5. Add lighting. light("Position, [-2, 2, 20D) lighting phong material([04,0.60.5,30]) set(h, Face Color,,[0.7070 BackFaceLighting, Iit' 6. Set viewpoint view([30,25]) set(gca, Camera ViewAngleMode, Manual") 7. Set axis limits and tick marks axis([515515-88]) set(gca, ZTickLabel", Negative Positive 8. Set aspect ratio set(gca, Plot Box AspectRatio, [2.52. ID) 9. Annotate the graph with axis labels, xlabel(XA legend. and text ylabel(Y Axis") zlabel function Value) title(Peaks')MATLAB Lecture 9  School of Mathematical Sciences Xiamen University  http://gdjpkc.xmu.edu.cn  Lec9­1 MATLAB Lecture 9 –Graphics ­Surface 绘图 Ref: MATLAB→3­D  Visualization→Creating  3­D  Graphs  l Vocabulary: plot  绘图 surface 曲面 mesh  网格 grid  格子 illustrate  图解 region  区域 polygon  多边形 peak  顶点 tick  记号 helix  螺旋 magenta  洋红色 cyan  青色 gray  灰色 aquamarine 碧绿色 l Some functions Plot3  mesh  surf meshgrid  fill3  fill  *axis square *cylinder *sphere *comet3  l 3­D Graphs  ² A Typical 3­D Graph This table illustrates typical steps involved in producing  3­D scenes  containing either data  graphs or models of 3­D objects.  Step  Typical Code 1.  Prepare your data.  Z = peaks(20);  2.  Select  window and position plot  region  within window.  figure(1) subplot(2,1,2) 3.  Call 3­D graphing function.  h = surf(Z);  4.  Set colormap and shading algorithm.  colormap hot  shading interp  set(h,'EdgeColor','k') 5.  Add lighting.  light('Position',[­2,2,20]) lighting phong  material([0.4,0.6,0.5,30]) set(h,'FaceColor',[0.7 0.7 0],...  'BackFaceLighting','lit')  6.  Set viewpoint.  view([30,25]) set(gca,'CameraViewAngleMode','Manual')  7.  Set axis limits and tick marks.  axis([5 15 5 15 ­8 8]) set(gca,'ZTickLabel','Negative||Positive') 8.  Set aspect ratio.  set(gca,'PlotBoxAspectRatio',[2.5 2.5 1]) 9.  Annotate the graph with  axis labels,  legend, and text.  xlabel('X Axis') ylabel('Y Axis') zlabel('Function Value') title('Peaks')