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Topic: I'm new to matlab; why is this function wrong?
Replies: 5   Last Post: Dec 6, 2012 12:41 PM

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Posts: 4
Registered: 12/6/12
Re: I'm new to matlab; why is this function wrong?
Posted: Dec 6, 2012 11:40 AM
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The program now brings up a plot, but it's blank. It is supposed to plot an X in the middle and an orbit of green o's.

It also brings up this error: ??? Undefined function or method 'orbits' for input arguments of type 'double'.

Error in ==> two_dimensional_ac at 15
[R V] = orbits(Ro, Vo, del_t)

function [R V] = orbits(Ro, Vo, del_t)
Ro=[1.5e11, 0];
Vo=[0, 2*pi*Ro(1)/(365*24*60*60)];
G = 1.67e-11;
Ms = 1.97e30;
d = (Ro(1)^2 + Ro(2)^2)^(3/2);
a = -(G*Ms/d)* Ro;
V = Vo + a * del_t;
R = Ro + Vo * del_t + .5 * a * del_t^2;

for n = 1:1:730
hold on
[R V] = orbits(Ro, Vo, del_t) <----- Line 15 Error
hold on;

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