multiple trajectories with the same starting point

Dear friends

I'm working on this graph which consists of several trajectories. I want these trajectories to start from the same point though they don't.

The original thread follows

https://www.mathworks.com/matlabcentral/answers/488681-unwanted-line-connecting-last-point-of-current-plot-to-the-starting-one-of-the-next-plot

Thanks in advance