matlab 에 화살표 그리 기

[전재] matlab 에서. 화살 표를 그리다
matlab 화살 표를 그리다
작가: 순정 낭군
전체 참조 링크http://www.mathworks.com/matlabcentral/fx_files/14056/1/content/arrow3_examples.html
ARROW3   EXAMPLES   (R13)

Two-dimensional Quiver Plots

Example 1.

Example 2.

Example 3.

Three-Dimensional Quiver Plots

Example 4.

Example 5.

Cone Plots

Example 6.

Example 7.

Feather Plots

Example 8.

Example 9.

Compass Plots

Example 10.

Example 11.

Reference Frames

Example 12.

Example 13.

Example 14.

Named Colors

Example 15.

Update (Modify and Restore)

Example 16.

Two-Dimensional Quiver Plots
Example 1. (cf.  Joukowski Airfoil Transformation) t=10*pi/180; u=0.1; v=0.1; r=1.1; tol=8e-2;
s=u+i*v; k=2*r*sin(t); w=exp(i*t);
[x,y]=meshgrid(-2.5:0.1:3.5,-3:0.1:3);
z=x+i*y; z(abs(z-s)f=w*z+exp(-i*t)*r^2./(z-s)+i*k*log(z);
a=0:0.1:2*pi; zc=r*(cos(a)+i*sin(a))+s;
c1=-1.5; c2=2.5; c3=c2-c1;
c=contour(x,y,imag(f),c1:c3/16:c2);
set(gca,'color',0.5*[1 1 1])
hold on, daspect([1 1 1])
fill(real(zc),imag(zc),'y'), colorbar
map=get(gcf,'colormap');
domain=0:1/(size(map,1)-1):1; m=1;
while mif c(2,m)>9, p=c(:,m+1:n)';
    if p(end,1)>p(1,1), p=flipud(p); end
    ndx=10:10:length(p);
    p2=p(ndx,:); p1=p(ndx-3,:);
    cc=interp1(domain,map,(c(1,m)-c1)/c3);
    set(gca,'ColorOrder',cc)
    arrow3(p1,p2,'0o',0.8)
end, m=n+1;
end, hold off

Example 1. Joukowski Airfoil Transformation
Example 2. (cf.  Quiver) [x,y]=meshgrid(-1:1/21:1);
z=x.*exp(-x.^2-y.^2);
[c,h]=contour(x,y,z);
set(h,'EdgeColor',0.45*[1 1 1])
ndx=1:3:length(x);
x=x(ndx,ndx); y=y(ndx,ndx); z=z(ndx,ndx);
[u,v]=gradient(z,1/7);
p1=[x(:),y(:)]; u=u(:); v=v(:);
m=abs(u+i*v); % gradient magnitude
daspect([1 1 1]), set(gca,'color',0.3*[1 1 1])
hold on, colormap hot, scale=0.4;
arrow3(p1,p1+scale*[u,v],'|',min(1.25*m,0.85))
hold off, h=colorbar;
set(h,'YTickLabel',num2str(str2num(get(h,...
'YTickLabel'))/scale))

Example 2. Surface Gradients
Example 3. (cf.  Two-Dimensional Quiver Plots) [x,y,z]=peaks(-2:0.05:2);
contour(x,y,z,10); h=gca;
ndx=1:4:length(x);
x=x(ndx,ndx); y=y(ndx,ndx); z=z(ndx,ndx);
[u,v]=gradient(z,0.2);
p1=[x(:),y(:)]; u=u(:); v=v(:);
m=abs(u+i*v); % gradient magnitude
hold on, daspect([1 1 1]), scale=0.025;
arrow3(p1,p1+scale*[u,v],'|',0.9*m/max(m))
hold off, title('Dual Colormap')
h1=colorbar; h2=copyobj(h1,gcf);
set(h,'color',0.4*[1 1 1],...
'position',get(h,'position')+[0.05 0 0 0])
% ----------------------------------------------------- Right Colorbar
p=get(h1,'position');
set(h1,'position',[0.87,p(2),0.05,p(4)],...
'YTickLabel',num2str(str2num(get(h1,...
'YTickLabel'))/scale))                               % freeze labels
map=colormap; cdata=reshape(map,size(map,1),1,3);
set(get(h1,'children'),'cdata',cdata)              % freeze colors
set(get(h1,'title'),'string','Gradient')
% ------------------------------------------------------ Left Colorbar
caxis auto, colorbar, colormap autumn
set(h2,'YAxisLocation','left',...
'position',[0.08,p(2),0.05,p(4)])
set(get(h2,'title'),'string','Contour')

Example 3. Dual Colormap
Three-Dimensional Quiver Plots
Example 4. (cf.  Quiver3) [x,y]=meshgrid(-2:0.25:2,-1:0.25:1);
z=x.*exp(-x.^2-y.^2);
surf(x,y,z,'EdgeColor','none')
axis([-2.5 2.5 -1.5 1.5 -1 1]), daspect([1 1 1])
set(gca,'CameraViewAngle',7)
[u,v,w]=surfnorm(x,y,z);
p1=[x(:),y(:),z(:)]; N=[u(:),v(:),w(:)];
hold on
arrow3(p1,p1+0.5*N,'1.5_b')
hold off, colormap spring
light('position',[-1 -1 -1],'style','local')
light('position',[0 1 1]), lighting gouraud

Example 4. Surface Normals
Example 5. (cf.  Three-Dimensional Quiver Plots) vx=2; vy=3; vz=10; a=-32; t=(0:.1:1)';
x=vx*t; y=vy*t; z=vz*t+1/2*a*t.^2;
r=[x,y,z]; v=gradient(r')';
axis([0 3 0 4 -10 2]), pbaspect([2 1 1])
hold on, grid on, view([70 18])
arrow3(r,r+v,'b',0.9)
hold off

Example 5. Velocity Vectors
Cone Plots
Example 6. (cf.  Coneplot) load wind, wind_speed=sqrt(u.^2+v.^2+w.^2);
xmin=min(x(:)); xmax=max(x(:));
ymin=min(y(:)); ymax=max(y(:));
zmin=min(z(:));
hsurfaces=slice(x,y,z,wind_speed,[xmin,xmax],ymax,zmin);
set(hsurfaces,'FaceColor','interp','EdgeColor','none',...
              'AmbientStrength',0.6)
hold on, daspect([2,2,1]), view(30,40), axis tight
xrange=linspace(xmin,xmax,8);
yrange=linspace(ymin,ymax,8);
[cx cy cz]=meshgrid(xrange,yrange,3:4:15);
ui=interp3(x,y,z,u,cx,cy,cz);
vi=interp3(x,y,z,v,cx,cy,cz);
wi=interp3(x,y,z,w,cx,cy,cz);
m=sqrt(ui.^2+vi.^2+wi.^2); m=m(:)/30;
p1=[cx(:),cy(:),cz(:)]; p2=[ui(:),vi(:),wi(:)];
hcones=arrow3(p1,p2,'r',m,3*m,'cone');
set(hcones,'DiffuseStrength',0.8)
hold off, axis off
camproj perspective, camzoom(1.2)
camlight right, lighting phong

Example 6. Wind Speed and Direction
Example 7. (cf.  Vector Field Displayed with Cone Plots) load wind, wind_speed=sqrt(u.^2+v.^2+w.^2);
hiso=patch(isosurface(x,y,z,wind_speed,40),...
          'FaceColor','red','EdgeColor','none');
isonormals(x,y,z,wind_speed,hiso)
hcap=patch(isocaps(x,y,z,wind_speed,40),...
          'FaceColor','interp','EdgeColor','none',...
          'AmbientStrength',0.6);
hold on, colormap hsv, daspect([1,1,1]), view(65,45)
[f verts]=reducepatch(isosurface(x,y,z,wind_speed,30),0.07);
cx=verts(:,1); cy=verts(:,2); cz=verts(:,3);
ui=interp3(x,y,z,u,cx,cy,cz);
vi=interp3(x,y,z,v,cx,cy,cz);
wi=interp3(x,y,z,w,cx,cy,cz);
m=sqrt(ui.^2+vi.^2+wi.^2); m=m(:)/40;
p1=[cx(:),cy(:),cz(:)]; p2=[ui(:),vi(:),wi(:)];
h1=arrow3(p1,p2,'b',m,3*m,'cone');
xrange=linspace(min(x(:)),max(x(:)),10);
yrange=linspace(min(y(:)),max(y(:)),10);
[cx,cy,cz]=meshgrid(xrange,yrange,3:4:15);
ui=interp3(x,y,z,u,cx,cy,cz);
vi=interp3(x,y,z,v,cx,cy,cz);
wi=interp3(x,y,z,w,cx,cy,cz);
m=sqrt(ui.^2 + vi.^2 + wi.^2); m=m(:)/50;
p1=[cx(:),cy(:),cz(:)]; p2=[ui(:),vi(:),wi(:)];
h2=arrow3(p1,p2,'g',m,3*m,'cone');
hold off, axis tight, box on
set(gca,'xtick',[],'ytick',[],'ztick',[])
camproj perspective, camzoom(1.2)
camlight(-45,45), lighting phong

Example 7. Wind Speed and Direction
Feather Plots
Example 8. (cf.  Feather) theta=(-90:10:90)'*pi/180;
n=length(theta); p1=[1:n;zeros(1,n)]';
r=2*ones(n,1); [u,v]=pol2cart(theta,r);
plot([1 n],[0 0],'r')
axis([0 20 -2 2]), daspect([8 2 1])
hold on, grid on
arrow3(p1,p1+[u,v],'r',0.9)
hold off

Example 8. Feather Plot
Example 9. (cf.  Plotting Complex Numbers) t=(0:0.5:10)'; s=0.05+i; Z=exp(-s*t);
n=length(Z); p1=[1:n;zeros(1,n)]';
plot([1 n],[0 0],'b')
axis([0 22 -1 1]), daspect([8 1 1])
hold on, grid on
arrow3(p1,p1+[real(Z),imag(Z)],'b',0.8)
hold off

Example 9. Complex Number Plot
Compass Plots
Example 10. (cf.  Compass Plots) wdir =[45 90 90 45 360 335 360 270 335 270 335 335];
knots=[ 6 6 8 6   5   9   8   8   9 10 14 12];
[x,y]=pol2cart(wdir*pi/180,knots);
polar(0,15), axis(15.9*[-1 1 -1 1])
hold on
arrow3(zeros(length(x),2),[x',y'],'r',1.25)
hold off

Example 10. Wind Speed and Direction
Example 11. (cf.  Compass) Z=eig(randn(20)); m=abs(Z);
R=ceil(max(m)); r=R+0.3;
polar(0,R), axis(r*[-1 1 -1 1])
hold on
arrow3(zeros(length(Z),2),[real(Z),imag(Z)],'b',1.75*m/R)
hold off

Example 11. Complex Number Plot
Reference Frames
Example 12. Coordinate Axes p=[4 2 1]; axis([-6 6 0 5 -1 1])
pbaspect([2 1.5 1]), view(55,15)
hold on
arrow3(repmat([p(1:2),0],4,1),...
[0 p(2) 0;p(1) 0 0;p;0 0 0],'--o',0,0,0.5)
arrow3(zeros(3),diag([7,5,1]),'o')
arrow3([0 0 0],p,'2.5s',1.5,[],0)
hold off, axis off, camlight left
set(gca,'CameraViewAngle',4)
text(7.1,0,0,'X'), text(0,5.05,0,'Y')
text(0,0,1,'Z','VerticalAlignment','bottom',...
'HorizontalAlignment','center')

Example 12. Coordinate Axes
Example 13. Eigenvectors n=500; % generate test data
newz=[ 1 1 1]/sqrt(3);
newy=[ 0 -1 1]/sqrt(2);
newx=cross(newy,newz);
R=[newx;newy;newz]; % rotation matrix
U=randn(n,3)*diag([1,2,3])*R;
u=U(:,1)+10; v=U(:,2)+20; w=U(:,3)+30;
% plot eigenvectors with mean origin
plot3(u,v,w,'r.')
axis([0 20 10 29 20 40]), daspect([1 1 1])
view([-70,15]), set(gca,'CameraViewAngle',8)
hold on, grid on
mu=repmat(mean([u,v,w]),3,1);
[V,D]=eig(cov([u,v,w]));
p=9*V'+mu;
arrow3(mu,p,[],1.25,[],0)
p=p+ones(3);
text(p(1,1),p(1,2),p(1,3),'bfU')
text(p(2,1),p(2,2),p(2,3),'bfV')
text(p(3,1),p(3,2),p(3,3),'bfW')
hold off

Example 13. Eigenvectors
Example 14. (cf.  Frenet) z=(0:2/99:2)'; t=2*pi*z; r=2+z;
x=r.*cos(t); y=r.*sin(t);
R=[x,y,z]; dR=gradient(R')';
m=repmat(sqrt(sum(dR.*dR,2)),1,3);
T=dR./m; dT=gradient(T')';
m=repmat(sqrt(sum(dT.*dT,2)),1,3);
N=dT./m; B=cross(T,N);
plot3(x,y,z,'color',0.5*[1 1 1])
axis([-4 4 -4 4 0 2.5])
hold on, grid on, pbaspect([1 1 1])
set(gca,'CameraViewAngle',7)
plot3(0,0,0,'r'), plot3(0,0,0,'color',[0 0.5 0])
plot3(0,0,0,'b')
legend('Curve','Tangent','Normal','Binormal',2)
ndx=1:4:length(x); R=R(ndx,:);
arrow3(R,R+1.4*T(ndx,:),'r',0.9)
arrow3(R,R+1.4*N(ndx,:),'e',0.9)
arrow3(R,R+0.4*B(ndx,:),'b',0.9)
hold off, view(-50,5)
set(gcf,'renderer','zbuffer')

Example 14. Frenet Frames
Named Colors
Example 15. Named Color Table arrow3('colors',0.4) % 24 named colors with 44 adjustable shades

Example 15. Named Color Table
Color Equivalencies
ColorOrder     
      Arrow3
Simulink   
      Arrow3
Color1
 
Blue
LightBlue
 
aZure
Color2
 
Evergreen
DarkGreen
 
Asparagus
Color3
 
Red
Orange
 
kumQuat
Color4
 
Sky blue
Gray
 
Light gray
Color5
 
Violet
 
Color6
 
Pear
 
Color7
 
Dark gray
 
다음으로 전송:https://www.cnblogs.com/Kermit-Li/p/4071830.html