You can create one line for each spectrum (this would probably be in the plot button Callback) and then set the visibility of the lines in the table's CellSelectionCallback function. Something like the code below. You can copy/paste the code and run it on your system to see how it works, and then take the relevant parts and adapt them to your existing code. (I can't really demonstrate the table cell selection callback here, as far as I can tell.)
function main_gui()
handles.figure = figure();
fpos = get(handles.figure,'Position');
N = 7;
handles.table = uitable( ...
'Data',arrayfun(@(x)sprintf('REQ_%02d',x),1:N,'UniformOutput',false).', ...
'CellSelectionCallback',@cb_select, ...
'Units','pixels', ...
'Position',[fpos(3)-160 10 150 fpos(4)-20]);
handles.axes = axes( ...
'Units','pixels', ...
'Position',[10 10 fpos(3)-180 fpos(4)-20]);
colors = get(handles.axes,'ColorOrder');
handles.lines = cellfun(@(x)line( ...
'Parent',handles.axes, ...
'Color',x, ...
'XData',1:10, ...
'YData',10*rand(1,10), ...
'Visible','off'), ...
num2cell(colors(mod(0:N-1,size(colors,1))+1,:),2));
guidata(handles.figure,handles);
end
function cb_select(src,evt)
handles = guidata(src);
idx = evt.Indices(:,1);
set(handles.lines,'Visible','off');
set(handles.lines(idx),'Visible','on');
end
