How to draw 3D XYZ plot with a matrix?

Hello, I have a 3D matrix (x, y ,z) such as:

38 70 0;

42 70 2;

42 72 4;

45 71 -2;

43 75 3

I want to draw a 3D XYZ plot as shown in the fig attached,each two neighbour points are connected with an arrow line. The color of the line between each two points is related to the index of the end point. Could you please help me with this? It is appreciated!

Ruik

Answer 1

[jonas]

I stitched this together using quiver3. Possibly a bit buggy.

%%Start point coordinates
A=[38 70 0;
42 70 2;
42 72 4;
45 71 -2;
43 75 3]

%%Length of arrows
B=[diff(A);0 0 0]

%%Plot
figure;hold on
cm=colormap(jet(length(A)-1));
colorbar(gca,'ticks',1:length(A))
caxis([1 length(A)])
for i=1:length(A)-1
s=sqrt(sum(B(i,:).^2)); %Equally sized arrow heads
%s=.3 %Uncomment for scaled arrow heads  
h(i)=quiver3(A(i,1),A(i,2),A(i,3),B(i,1),B(i,2),B(i,3),1,'maxheadsize',1.5/s)
h(i).Color=cm(i,:);
end
box on
grid on
view(3)
set(h,'linewidth',2)

Answer 2

[ruik zhang]

Hi Jonas, it seems work well. Thank you. Ruik