Simulink simulate trajectories of Dubin's car

hello people,

I am trying to simulate the trajectories of a vehicle with the help of Simulink.

As we know, the equations of the vehicle are

xdot=vcos(theta) ydot=vsin(theta) thetadot=w

I put an input for w (a constant source or a step), ie w=2. That means that my object goes straight. Then I integrate w and construct xdot and ydot with the help of math operators. In the end I integrate the xdot and ydot, and store the values of x and y to Workspace with the help of Sink block.

As a result, the output of x at scope is a sin function, and y is a cos function. When I export it in Matlab workspace it shows a double vector. Shouldn't this be a 1D array? When I plot( x,y), I should expect something like a cyclic plot, but something wired is shown, because I have 2 double vectors, x and y. Could you please help what's going wrong with my vectors?