I'm new to Matlab, and this is my first question here.
I'm working with a scattered dataset. I have a long array of height values, as well as two equally long arrays for the x and y coordinates per height value. So, point 1 has a height of z(1) and is located at x(1), y(1), and so forth. All xy values fall within a range of xstart:xend and ystart:yend.
I'd like to reduce the amount of values I have by taking the average over a smaller n by n grid. Since the data is scattered, it is possible no datapoints fall within a grid cell. In that case I'd like the cell value to be set to 0, instead of NaN. So the new arrays would be the average height per cell in a znew array, and the cell center coordinates in the xnew and ynew arrays. Just to be clear, I've illustrated what I want in the figure below:
What is the best way to do this? Thanks in advance.