Gridding a large XYZ data set with limited memory

Hi,

I am trying to make a regular XYZ file from a large point cloud XYZ data set, but am hitting a 'not enough memory' error.

The code I am using is:

%load height file
hp=csvread(h_file);
%make a regular XYZ file
mins=min(hp);
maxs=max(hp);
rmins=round(mins);
rmaxs=round(maxs);
gridmin=rmins-1;
gridmax=rmaxs+1;
[xq,yq]=meshgrid(gridmin(1):pDiam:gridmax(1), gridmin(2):pDiam:gridmax(2));
vq=griddata(hp(:,1),hp(:,2),hp(:,3),xq,yq,'v4');

Is there perhaps a more elegant way to achieve the same thing using less memory (avoiding trying to solve the problem by brute force of using more memory)?