二维图形绘制

MATLAB基本的二维图形包括线型（Line Plots）、散点型（Scatter Plots）、条形（Bar Plots）、极坐标型（Polar Plots）及矢量图（Vector Fields）。

(MATLAB的书买的太鸡肋了，里面东西都不全，help才是王道）

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plot指令

1.种类

• plot（x,y）
• plot (y)
• plot (z)
• plot (A)
• plot (x,A)
• plot (A,x)
• plot (A,B)
• plot (x,y,str)
• plot (x1,y1,str1,x2,y2,str2,...)
  

2.栅格

grid on 命令可以在当前图形的单位标记处添加栅格

grid off命令可以取消栅格的显示

3.文字说明

• title('text')
• xlabel('text')
• ylabel('text')
• zlabel('text')
• text(x,y, 'text')
• text(x,y, 'text', 'sc')
  

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4.程序

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  clc;clear;
  
  
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  normset = 0;
  
  
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  scale    = 0.1;
  
  
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  origin = importdata('geo_origin.txt');%读取文件
  
  
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  deformation = importdata('geo_deformed.txt');
  
  
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  eigenVec  = importdata('EigenDeformShapes.txt');
  
  
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  x_origin = origin(:,1);%读取第1列
  
  
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  y_origin = origin(:,2);%读取第2列
  
  
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  z_origin = origin(:,3);%读取第3列
  
  
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  %axis([-0.1 2.1 0 0.8 0 1]);
  
  
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  scatter3(x_origin,y_origin,z_origin,60,'blue','*')%绘制三维散点图
  
  
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  %x,y,z三个方向；图标大小；蓝色；图标*
  
  
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  axis equal;
  
  
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  xlabel('x','FontSize',18);%在x轴下的中间位置输入x，字号大小18
  
  
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  ylabel('y','FontSize',18);%在y轴下的中间位置输入x，字号大小18
  
  
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  grid on%画栅格
  
  
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  %figure
  
  
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  %plot3(x_origin,y_origin,z_origin,'b-','MarkerSize',6,'MarkerFaceColor','b')
  
  
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  %axis square equal;
  
  
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  %set(gca,'XTick',[0:0.1:1]);
  
  
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  %set(gca,'YTick',[0:0.2:1]);
  
  
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  %hold on
  
  
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  % for i= 0:1:78
  
  
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  %     a = num2str(i)
  
  
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  %     ttt = ['initiGeoOne.txt' a '.txt'];
  
  
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  %     tt = importdata(ttt);
  
  
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  %     x_temp = tt(:,1);
  
  
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  %     y_temp = tt(:,2);
  
  
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  %     z_temp = tt(:,3);
  
  
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  %     %plot3(x_temp,y_temp,z_temp,'r-','MarkerSize',6,'MarkerFaceColor','b')
  
  
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  %     hold on
  
  
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  % end
  
  
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  x_deformation = deformation(:,1);
  
  
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  y_deformation = deformation(:,2);
  
  
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  z_deformation = deformation(:,3);
  
  
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  %plot3(x_deformation,y_deformation,z_deformation,'r-','MarkerSize',6,'MarkerFaceColor','r')
  
  
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  %scatter3(x_deformation,y_deformation,z_deformation,36,'red','+')
  
  
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  for i=0:1:19
  
  
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      normset = i;
  
  
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  x_norm = x_origin + eigenVec(:, normset * 3 + 1) * scale;
  
  
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  y_norm = y_origin + eigenVec(:, normset * 3 + 2) * scale;
  
  
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  z_norm = z_origin + eigenVec(:, normset * 3 + 3) * scale;
  
  
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  figure;
  
  
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  scatter3(x_origin,y_origin,z_origin,30,'k','+')
  
  
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  %plot3(x_origin,y_origin,z_origin, 'b.','MarkerSize',4,'MarkerFaceColor','b','LineWidth',0.5)
  
  
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  hold on
  
  
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  scatter3(x_norm, y_norm, z_norm,36,'b','o')
  
  
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  %plot3(x_norm, y_norm, z_norm, 'r-','MarkerSize',6,'MarkerFaceColor','r','LineWidth',1)
  
  
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  axis equal;
  
  
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  xlabel('x','FontSize',18);
  
  
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  ylabel('y','FontSize',18);
  
  
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  zlabel('z','FontSize',18);
  
  
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  %legend('Original',['Mode' num2str(i+1)],'Location','best');
  
  
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  %set (gca,'position',[0.1,0.1,1,1] );
  
  
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  %set(gca,'XTick',[0:0.2:1]);
  
  
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  %set(gca,'YTick',[-0.5:0.2:0.5]);
  
  
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  %set(gca,'ZTick',[-0.5:0.2:0.5]);
  
  
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  %axis square
  
  
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  grid on
  
  
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  end
  
  
  

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很不错，受教了