Plot cummulative values without creating a cumulative vector with the values

I have a set of variables which represent the power output of several generators. I'm trying to obtain a plot in which the values are stacked on top of each other as seen in the following image, whitout the neccesity of creating another variable in which I make the cummulative sum.

Any idea which plot variation can achieve something similar to this?

Answer 1

[Star Strider]

I am not certain what you are asking.

The posted plot can be created by the area function in MATLAB.

[Rafael Inarejo]

Thanks! That's the function i needed.

[Star Strider]

My pleasure!

If my Answer helped you solve your problem, please Accept it!

.

Answer 2

[Jan]

This cannot work. To get the y value of the line, you do have to perform a cumulative sum. There is no chance to avoid this calculation and I do not see a reason, why to avoid this.