nic_spm_sample_vol   

 returns voxel values from a memory mapped image - a compiled routine
 FORMAT X = spm_sample_vol(V,x,y,z,hold);
 V      -  is a memory mapped image volume
 x      -  matrix of x coordinates {pixels}
 y      -  matrix of y coordinates {pixels}
 z      -  matrix of z coordinates {pixels}
 hold   -  sets the interpolation method for the resampling.
           0          Zero-order hold (nearest neighbour).
           1          First-order hold (trilinear interpolation).
           2->127     Higher order Lagrange (polynomial) interpolation using
                      different holds (second-order upwards). 
          -127 - -1   Different orders of sinic_ interpolation. 
 X      -  output image

 OR     [X,dX,dY,dZ] = spm_sample_vol(V,x,y,z,hold);
 Similar to above, except that the derivatives in the three orthogonal
 directions are also returned.
_______________________________________________________________________

 spm_sample_vol will return the voxel values from a memory mapped
 volume indicated by V at coordinates x,y,z.  Values from coordinates
 outside the image are set to zero. x, y and z must be matrices of the
 same dimensions

 see also spm_slice_vol.m

_______________________________________________________________________
 Copyright (C) 2005 Wellcome Department of Imaging Neuroscienic_e

0001 function varargout = nic_spm_sample_vol(varargin)
0002 % returns voxel values from a memory mapped image - a compiled routine
0003 % FORMAT X = spm_sample_vol(V,x,y,z,hold);
0004 % V      -  is a memory mapped image volume
0005 % x      -  matrix of x coordinates {pixels}
0006 % y      -  matrix of y coordinates {pixels}
0007 % z      -  matrix of z coordinates {pixels}
0008 % hold   -  sets the interpolation method for the resampling.
0009 %           0          Zero-order hold (nearest neighbour).
0010 %           1          First-order hold (trilinear interpolation).
0011 %           2->127     Higher order Lagrange (polynomial) interpolation using
0012 %                      different holds (second-order upwards).
0013 %          -127 - -1   Different orders of sinic_ interpolation.
0014 % X      -  output image
0015 %
0016 % OR     [X,dX,dY,dZ] = spm_sample_vol(V,x,y,z,hold);
0017 % Similar to above, except that the derivatives in the three orthogonal
0018 % directions are also returned.
0019 %_______________________________________________________________________
0020 %
0021 % spm_sample_vol will return the voxel values from a memory mapped
0022 % volume indicated by V at coordinates x,y,z.  Values from coordinates
0023 % outside the image are set to zero. x, y and z must be matrices of the
0024 % same dimensions
0025 %
0026 % see also spm_slice_vol.m
0027 %
0028 %_______________________________________________________________________
0029 % Copyright (C) 2005 Wellcome Department of Imaging Neuroscienic_e
0030 
0031 % John Ashburner
0032 % $Id: spm_sample_vol.m 112 2005-05-04 18:20:52Z john $
0033 
0034 
0035 %-This is merely the help file for the compiled routine
0036 error('spm_sample_vol.c not compiled - see Makefile')