Combining two codes as one

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DARLINGTON ETAJE 2019-8-13

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https://ww2.mathworks.cn/matlabcentral/answers/475897-combining-two-codes-as-one

评论： dpb 2019-8-13

Hello Family,

Please I need to create three circles. Challenge One: Circle 1 is small and going round on the circumference of circle 2. Challenge 2: Circle 2 is nearly as big as circle 3. Circle 2 is the inner circle with close diameter with circle 3. Circle 2 is going round inside circle 3. I have the codes for challenge One and challenge Two individually...the problem is to make the two codes work as one.

Challenge One Codes:

r=18;
R=20;
radius=[r R]
velocity=[45 0]
colors=['c','r'] % This is to just make the points different colors
p=zeros(2,1); %here we will store the handles to delete the point 
hold on
for i=1:2 %Loop to create multiple circles
  th=0:pi/50:2*pi;
  xunit=radius(i)*cos(th);
  yunit=radius(i)*sin(th);
  h=plot(xunit,yunit); 
  p(i)=plot(xunit(1),yunit(1),'o','MarkerFaceColor',colors(i),'Color',colors(i)); 
  %creates a point on each graph
end
time=[0:0.001:100]; %time vector in seconds
for t=1:length(time)
    for i=1:2 %Loop to create multiple circles
        delete(p(i)); %delete the old point
        %computes the new angle for each point as velocity*time
        xunit=radius(i)*cos(velocity(i)*time(t)); 
        yunit=radius(i)*sin(velocity(i)*time(t)); 
        %creates a point on each graph
        p(i)=plot(xunit(1),yunit(1),'o','MarkerFaceColor',colors(i),'Color',colors(i));                
    end
    pause(0.01); %wait 0.01 seconds so the plot is displayed
end
hold off

Challenge Two Codes

t = linspace(0,5*pi ); 
x = cos(t ); 
y = sin(t ); 
plot(7*x,7*y) 
axis equal 
hold on 
    for t0 = t 
        h = plot(2*sin(t0),2*cos(t0),'or ','markersize',175); 
       
        pause(0.09 ) 
        delete(h ) 
        axis equal
    end

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DARLINGTON ETAJE 2019-8-13

thanks for this...please assist with the codes cos I have tried really hard and its not working

dpb 2019-8-13

But you don't have any code at all that does the definition of a reference frame nor translation. Just trying to graft these two independent pieces together won't cut it for the problem you're trying to solve.

You need to read up on the geometry and algebra of translation and rotation to get the basic ideas down first. There's quite a bit of pedgogical info on graphics and robotics translation that will introduce you to the basic idea.

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