This function plots a 1D finite element field.
h=gf_plot_1D(mf,U,...)
This function plots a 1D finite element field.
Available options are specified as pairs of 'option name'/'option value':
'style', 'bo-': line style and dof marker style (same // syntax as in the Scilab command 'plot');
'color', '': override line color (by a given color name);
'dof_color', '': overrride color of dof markers;
'width', 2: line width.