Data must be a single matrix Y or a list of pairs X,Y. Need help on plotting 3D graph!

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array= Tmax/n; %This expends the data points n = 2000 and Tmax = 20
t = 0:array:Tmax; %This sets the time interval
e = 2.71828; %e's true value
y1 = A0*e.^(-LamdaR.*t).*cos(LamdaI.*t); %This is the position function x(t)
y2 = -A0*LamdaI*e.^(-LamdaR*t).*((sin(LamdaI*t)+((LamdaR/LamdaI))*cos(LamdaI*t)));
%equation above is the speed
%equation (dx/dt)
plot(y1,y2,t),xlabel('x'),ylabel('dx/dt'),zlabel('time'),grid;
i am trying to ploy a 3d graph but keep on getting an error that says Data must be a single matrix Y or a list of pairs X,Y. please help?
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Accepted Answer

Star Strider
Star Strider on 16 Jan 2018
Use the plot3 (link) function instead:
plot3(y1,y2,t),xlabel('x'),ylabel('dx/dt'),zlabel('time'),grid;

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