How do I extract each array/iteration from a for-loop and add the arrays together for an x-y graph?

I have a code that builds on itself through a for loop until it reaches a certain point.  For example, the data rises for a certain amout of time and reaches an ending point, and then at that ending point then becomes the starting point for the next set of [falling] data, and then the next rise's starting point begins at the ending point of the aformentioned fall and so on.

I want to put all of this data in an x-y graph continuously.  How can I extract the array from each loop and then set it into a continuous graph? 

Thaks for your help!