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POResampling Matrix and restoring in one single Matrix
 

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    <p>I am new to this forum, so please bear with me. I have been working on this Matlab problem for a while now:</p> <p>I have a digital elevation model (DEM) new_sub(x,y) in tif format. So it is a x-by-y matrix containing heights (z). I wish to resample parts of this DEM in different resolutions and restore this in another matrix. So far I have been working with for loops to change the resolution of different areas of the DEM and then wrote the results to an xyz-file:</p> <p>x y z 1 1 123 1 2 233 1 3 231 2 1 235 2 2 531 2 3 452</p> <p>and so forth. Here is the code: </p> <pre><code>xmax = size(new_sub,2); ymax = size(new_sub,1); for k=1:200 % y for l=1:xmax % x fprintf(fid, '%d %d %d \n',l,xmax+1-k,new_sub(k,l)); end end % 1:4 for k=200/2+1:size(new_sub,1)/2 for l=1:size(new_sub,2)/2 fprintf(fid, '%d %d %d \n',l*2,ymax+2-k*2,new_sub(k*2,l*2)); end end </code></pre> <p>This does work, but seems to be rather complicated. Moreover, it does not allow me to store the resampled areas in a single matrix within Matlab.</p> <p>Is there a more efficient way of resampling certain areas of a Matrix with different resolutions, writing them into a new Matrix containg all resampled areas and then writing it to a file? I was looking into repmap, but could not think of a clever way of using it!</p> <p>Your help is much appreciated!</p> <p>THeo</p>
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