15 May
                
                    2017
                
            
            
                15 May
                
                '17
                
            
            
            
        
    
                2:04 p.m.
            
        On 15 May 2017, at 14:01, David Ham <David.Ham@imperial.ac.uk> wrote:
Actually why extract the values and then re-interpolate? Can't you just set x=mesh.coordinate and use x[0] in the expression?
Better, write: x = SpatialCoordinate(mesh) and use x[0] directly. Lawrence