How can I create a 3d plot with each vector displayed as an arrow, and one line connecting the tail to tip?

Question

John Perrow 2015-6-28

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/225675-how-can-i-create-a-3d-plot-with-each-vector-displayed-as-an-arrow-and-one-line-connecting-the-tail

回答： Adam Hug 2015-6-30

I am trying to create a program that can import an excel file of 3 columns with the vector data, and display these vectors into a 3d graph. Here's my code so far. I am only getting an empty graph generated though :/

data = xlsread('vectordata.xlsx');
radius = data(:,1);
theta = data(:,2);
phi = data(:,3);
x = radius.*cos(theta).*sin(phi);
y = radius.*sin(theta).*sin(phi);
z = radius.*cos(phi);
sumx = sum(x(:));
sumy = sum(y(:));
sumz = sum(z(:));
[radius, theta, phi] = cart2sph(sumx, sumy, sumz);
xpt(1) = 0;
ypt(1) = 0;
zpt(1) = 0;
pt(1,1) = xpt;
pt(1,2) = ypt;
pt(1,3) = zpt;
numvec = size(data,1);
for k = 1:numvec;
    xpt1 = 1:numvec;
    ypt1 = 1:numvec;
    zpt1 = 1:numvec;
end
figure
plot3(radius, theta, phi);
axis([0 5 0 5 0 5]);
xlabel('x forces');
ylabel('y forces');
zlabel('z forces');
title('3D vector graph');