[〜#〜] matlab [〜#〜] でベクトルをプロットする最も簡単な方法を知りたい。例えば:
a = [2 3 5];
b = [1 1 0];
c = a + b;
このベクトルの追加をhead-to-tail/parallelogram法として視覚化したいです。これらのベクトルを矢印でプロットするにはどうすればよいですか?
a = [2 3 5];
b = [1 1 0];
c = a+b;
starts = zeros(3,3);
ends = [a;b;c];
quiver3(starts(:,1), starts(:,2), starts(:,3), ends(:,1), ends(:,2), ends(:,3))
axis equal
Aamir 提出 arrow.m from Erik Johnson 上の MathWorks File Exchange は非常に素晴らしいことに同意しますオプション。これを使用して、 ベクトル加算のさまざまな方法 を説明できます。
チップツーテール方式:
o = [0 0 0]; %# Origin
a = [2 3 5]; %# Vector 1
b = [1 1 0]; %# Vector 2
c = a+b; %# Resultant
arrowStarts = [o; a; o]; %# Starting points for arrows
arrowEnds = [a; c; c]; %# Ending points for arrows
arrow(arrowStarts,arrowEnds); %# Plot arrows
平行四辺形法:
o = [0 0 0]; %# Origin
a = [2 3 5]; %# Vector 1
b = [1 1 0]; %# Vector 2
c = a+b; %# Resultant
arrowStarts = [o; o; o]; %# Starting points for arrows
arrowEnds = [a; b; c]; %# Ending points for arrows
arrow(arrowStarts,arrowEnds); %# Plot arrows
hold on;
lineX = [a(1) b(1); c(1) c(1)]; %# X data for lines
lineY = [a(2) b(2); c(2) c(2)]; %# Y data for lines
lineZ = [a(3) b(3); c(3) c(3)]; %# Z data for lines
line(lineX,lineY,lineZ,'Color','k','LineStyle',':'); %# Plot lines
これを見つけました arrow(start, end)
function on MATLAB Central これは、真の大きさと方向でベクトルを描くという目的に最適です。
このようにして、
% vectors I want to plot as rows (XSTART, YSTART) (XDIR, YDIR)
rays = [
1 2 1 0 ;
3 3 0 1 ;
0 1 2 0 ;
2 0 0 2 ;
] ;
% quiver plot
quiver( rays( :,1 ), rays( :,2 ), rays( :,3 ), rays( :,4 ) );
% vectors I want to plot as rows (XSTART, YSTART, ZSTART) (XDIR, YDIR, ZDIR)
rays = [
1 2 0 1 0 0;
3 3 2 0 1 -1 ;
0 1 -1 2 0 8;
2 0 0 0 2 1;
] ;
% quiver plot
quiver3( rays( :,1 ), rays( :,2 ), rays( :,3 ), rays( :,4 ), rays( :,5 ), rays( :,6 ) );
% draw simple vector from pt a to pt b
% wtr : with respect to
scale=0;%for drawin vectors with true scale
a = [10 20 30];% wrt origine O(0,0,0)
b = [10 10 20];% wrt origine O(0,0,0)
starts=a;% a now is the origine of my vector to draw (from a to b) so we made a translation from point O to point a = to vector a
c = b-a;% c is the new coordinates of b wrt origine a
ends=c;%
plot3(a(1),a(2),a(3),'*b')
hold on
plot3(b(1),b(2),b(3),'*g')
quiver3(starts(:,1), starts(:,2), starts(:,3), ends(:,1), ends(:,2), ends(:,3),scale);% Use scale = 0 to plot the vectors without the automatic scaling.
% axis equal
hold off