How to plot multiple graphs by a GUI callback function?

Hi, thank you always for your support.

On a GUI window, I am trying to plot multiple graphs from a matrix form, each column of which is a data to be plotted.

I wrote a callback function as below, but the handler could plot just one graph in each call back.

Is there any good way to circumvent this?

Thank you in advance:)

hp = uipanel('Title','title','FontSize',12, 'FontWeight', 'bold',...)

handler.haxp = axes('Units','normal', 'Position', [...], 'Parent', hp);

handler.plot_handle = plot(handler.haxp, x, data);hold(handler.haxp,'on');

handler.plot_handle = plot(handler.haxp, x(1), data(1), 'xr','linewidth',2);

set(get(handler.haxp_image,'Children'),'ButtonDownFcn',@plot_graph);

function plot_graph(varargin):

set(hh.plot_handle, 'YData', data); hold(hh.haxp, 'on')

end