Hello,<br><br>I was trying to create a cortical thickness map with constant values in order to perform some tests. At first I tried using mris_convert. I converted my thickness file into ascii:<br><br>mris_convert lh.thickness
 lh.thickess.asc<br><br>then I used matlab to change all the values in the last column to 2,0. I tried to convert the ascii file back to surface file by doing<br><br>mris_convert lh.thicness.asc lh.thickness<br><br>but I got &quot;Segmentation fault&quot;. How can I convert may ascii file into a surface one?
<br><br>After failling to acomplish this, I tried using the save_mgh and load_mgh file, nevertheless I&#39;m not quite sure which input values are needed. Where can I put my fake values in the save_mgh file? And what is &quot;vol&quot;?
<br><br>Thanks,<br><br>Ines<br>