ascii2xyz

ASCII2XYZ reads in a raster text file in ARC ASCII format and converts values to a m x 3 matrix of x, y, a z values.

This code is mostly vectorized and performs well with reasonably large files (see example below).

%read in a 25 MB file
a=dir('foo.txt')

a =

name: 'foo.txt'
date: '17-Oct-2008 08:53:34'
bytes: 25437683
isdir: 0
datenum: 7.3370e+005

tic
xyz=ascii2xyz('foo.txt');
toc
Elapsed time is 8.110956 seconds.