Interpolation using average of pixels

I have ocean color remote sensing data in netcdf format that I want to interpolate. For example, I have the variables latitude, longitude and Z which is the SPM (Suspended material). I was using the function TriScatteredInterp to interpolate among different grid sizes. What I would like to know is if there is function that provides the option to change the interpolation methods, instead of using the nearest neighbor method for example, I would like to interpolate data using the average. So, if I want to resize the image to have one pixel created from two pixels, I would like to do it using the average of those two pixels. Is this possible? I hope it is clear. Thank you

Answer 1

[Walter Roberson]

http://www.mathworks.com/help/matlab/ref/triscatteredinterp.html defaults to using method 'linear' (which sounds like what you like) and method 'nearest' has to be specified as an option.

[SnovG]

Thanks!

Answer 2

[[e-mail]]

Hi

I had the same problem of too large measurement size of 2048*2048 and I wanted to have 1024*1024, 512*512 and so on. I just wrote a simple code that might be useful for you too. The code downsample your original square matrix to lower sizes.