I am trying to publish and subscribe to an array containing X,Y,Z values that I find useful. These values are taken directly from a PointCloud.

The general format for the array is:

my_array[x][y] = z;

However, I can't seem to find any useful tutorials for my setup. I saw multidimensional arrays, but I'm not sure how to apply them to this situation. From what I read, it doesn't seem like it would apply.

Thanks for your help!