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lyngby_ui_voxelmask

(export/lyngby/lyngby_ui_voxelmask.m)


Function Synopsis

varargout = buttonHelp(h, hg)

Help text

 lyngby_ui_voxelmask	- User interface for voxelmask editing 

       function lyngby_ui_voxelmask(command,parameter1) 

       This function is used to control the window for setting up the
       VOXEL_MASK global variable. 

       The VOXEL_MASK variable is usually "VOXEL_MASK = 1" which means
       that all voxels are included (ie, no voxelmask). If VOXEL_MASK
       is sparse the number of rows should correspond to the full
       volume and the number of columns to the number of voxels in
       the masked volume.

       Select the appropriate command from the popup menu and press
       "Go!". The VOXEL_MASK global variable will be updated and the
       window can be closed with the "Close" button.
 
       "~isnan from first volume" means that all voxels different from
       NaN in the first volume (corresponding to FILENAME_STARTINDEX)
       will be included in the mask. 

       "~isnan from ANALYZE file" will read an user-specified ANALYZE
       file and include voxels in the mask that are different from
       NaN. 

       "~0 from ANALYZE file" will read an user-specified ANALYZE
       file and include voxels in the mask that are different from
       0. 

       "Threshold from first volume" will find the voxels in the
       first volume that are above the threshold.

       This function is called from lyngby_ui_loadfile when the
       'voxel mask' 'edit' button is pressed. The 'Apply' button
       should be pressed before the voxel mask is called. 

       Example:
         % Reduce the volume with the voxel mask
         lyngby_global
         V_big   = lyngby_getvolume(FILENAME_STARTINDEX);
         V_small = V_big * VOXEL_MASK;

         % To get back to the full volume transpose the voxelmask
         V_big2  = V_small * VOXEL_MASK';

       See also LYNGBY, LYNGBY_UI_MAIN, LYNGBY_UI_LOADFILE,
                LYNGBY_GLOBAL.  

 $Id: lyngby_ui_voxelmask.m,v 1.3 2003/09/15 10:28:44 fnielsen Exp $

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