CODEWITHSUNDEEP
matlabplot
JAN
JAN

Reputation: 21865

Plot 3 vectors in 3d

I have 3 vectors , one for angles of Phi , another for angles of Teta , and the last one a vector of points in the Y axe ,after computing the points of Teta & Phi with a function :

for teta = 0 : 10^-2 : pi/2 
    for phi = 0 : 10^-2 : pi/2 
        Y(current) = v*sin(phi)*sin(teta);  
        Teta(current) = teta;
        Phi(current) = phi;
        current = current + 1;
    end
end

How can I plot the three of them together ?

I want to plot a 3d graph with Teta & Phi as a function of Y . I've tried with plot3 but the result wasn't so satisfactory .

Thanks

Upvotes: 2

Views: 1667

Answers (2)

tmpearce
tmpearce

Reputation: 12693

I'm unclear about the exact goals, but here's my interpretation:

teta = 0:.01:pi/2;
phi =0:.01:pi/2;
[t p]=meshgrid(teta,phi);
Y = v*sin(p)*sin(t);
surf(t,p,Y)
xlabel('teta')
ylabel('phi')
zlabel('1*sin(teta)*sin(phi)')

Create vectors of teta and phi values, use meshgrid to produce a matrix of t and p values, and use the vectorized form of sin (rather than a for loop). Then use surf to plot the results as a surface in 3D.enter image description here

Upvotes: 2

Pavel Oganesyan
Pavel Oganesyan

Reputation: 6924

enter image description here

This one is ok? I've made step larger and set v as 1.

current = 1;
for teta = 0 : 10^-1 : pi/2 
    for phi = 0 : 10^-1 : pi/2 
        Y(current) = 1*sin(phi)*sin(teta);  
        Teta(current) = teta;
        Phi(current) = phi;
        current = current + 1;
    end
end
plot3(Teta,Phi,Y);
xlabel('Teta')
ylabel('Phi')
zlabel('Y')
grid on

Upvotes: 1

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