hi there i have this code it doesnot work will and I need help with finding the error

step=2.5; t11=0; t12=360; t21=0; t22=360;
a1=1; a2=0.5;
x = zeros(length(t11:step:t12),length(t21:step:t22)); %pre allocate the size. This helps if you want to easily change values also. It will not have remenant data left from previous "runs"
y = zeros(length(t11:step:t12),length(t21:step:t22));
index=1; %initilaize the index variable. Must be greater than 0.
for i=t11:step:t12
    for k=t21:step:t22
        x(index)=a1*cos(i*pi/180)+a2*cos((pi/180)*(i+k));
        y(index)=a1*sin(i*pi/180)+a2*sin((pi/180)*(i+k));
        index = index+1; %add one to the index before next cycle.
    end
end
plot(x,y,'k') %plot the arrays of data with a black line.

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Kareem Alnahar 2019-11-5

Thank you so much that's so helpful

Steven Lord 2019-11-5

Another potential approach, if you need the plot to appear and be updated at each iteration, would be to use an animatedline to which you addpoints inside the loop. Use the example on the animatedline documentation page as a model.

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