If I rotate the points of a Poincare plot in matlab like this:
rot = [cosd(45),sind(45);-sind(45),cosd(45)];
RR_Data = rot*[RR(1,1:end-1);RR(1,2:end)]; % compute 2-by-N array of rotated data
RR_X = RR_Data(1,:); % extract x-coordinates of rotated data
RR_Y = RR_Data(2,:); % extract y-coordinates of rotated data
The out coming cloud is shifted in the y direction to approximately 0 and in the x direction + 0.2 seconds.
Dose anyone know why this happens?
Lambert Zijp
Maybe you are not rotating around the center of mass, or around the average X and Y?
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Alena Drkošová
Thank you. You’re right I didn’t rotate it around the center of mass but just around the origin of coordinates. I fixed it already.
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