MATLAB: Show figure from Gui code

Question

Hi everybody.

I have a problem with my code GUI.

    a1=str2num(get(handles.x1,'String'));
    b1=str2num(get(handles.y1,'String'));
    c1=str2num(get(handles.z1,'String'));
    a2=str2num(get(handles.x2,'String'));
    b2=str2num(get(handles.y2,'String'));
    c2=str2num(get(handles.z2,'String'));
    a3=str2num(get(handles.x3,'String'));
    b3=str2num(get(handles.y3,'String'));
    c3=str2num(get(handles.z3,'String'));
    f = figure();
    ax = axes('Parent',f) 
    plot3 (ax, [a1 a2 a3],[b1 b2 b3],[c1 c2 c3], 'Marker','o','LineStyle','-');
    grid(ax, 'on');
    rotate3d(ax, 'on');

With this code,i can plot a graph with my GUI,but when i add a plot in my figure is not ok.

example:

      a1=str2num(get(handles.x1,'String'));
      b1=str2num(get(handles.y1,'String'));
      c1=str2num(get(handles.z1,'String'));
      a2=str2num(get(handles.x2,'String'));
      b2=str2num(get(handles.y2,'String'));
      c2=str2num(get(handles.z2,'String'));
      a3=str2num(get(handles.x3,'String'));
      b3=str2num(get(handles.y3,'String'));
      c3=str2num(get(handles.z3,'String'));
      f = figure();
      ax = axes('Parent',f) 
      plot3 (ax, [a1 a2 a3],[b1 b2 b3],[c1 c2 c3], 'Marker','o','LineStyle','-');
      plot3 (ax, [a1 a2 a3],[-b1 -b2 -b3],[c1 c2 c3], 'Marker','o','LineStyle','-');
      grid(ax, 'on');
      rotate3d(ax, 'on');

It show only line. I need two line and many line in my figure.

Answer 1

After the line

plot3 (ax, [a1 a2 a3],[b1 b2 b3],[c1 c2 c3], 'Marker','o','LineStyle','-');

add

hold(ax, 'on');