matlab - matlab图中数据提示自定义

Question

我有一个包含多个图的图表，每个图都来自不同的源文件。我希望数据提示告诉我 (X,Y) 加上源文件的名称。这么久我最好的尝试(没有成功)是这样的:

dcm = datacursormode(gcf);
datacursormode on;
set(dcm,'UpdateFcn',[@myfunction,{SourceFileName}]);

其中 myfunction 是在这种情况下使用的默认函数，如粘贴在此消息末尾和此处解释的那样: http://blogs.mathworks.com/videos/2011/10/19/tutorial-how-to-make-a-custom-data-tip-in-matlab/最后，SourceFileName 是一个带有源文件名称的字符串。

有人知道更简单(或正确)的方法吗？

提前致谢。

function output_txt = myfunction(~,event_obj)
% Display the position of the data cursor
% obj          Currently not used (empty)
% event_obj    Handle to event object
% output_txt   Data cursor text string (string or cell array of strings).

pos = get(event_obj,'Position');
output_txt = {['X: ',num2str(pos(1),4)],...
    ['Y: ',num2str(pos(2),4)]};

% If there is a Z-coordinate in the position, display it as well
if length(pos) > 2
    output_txt{end+1} = ['Z: ',num2str(pos(3),4)];
end

end

Answer 1

p=plot( x,y);
setappdata(p,'sourceFile_whatever', SourceFileName)  

dcm = datacursormode(gcf);
datacursormode on;
set(dcm, 'updatefcn', @myfunction)

在回调函数中:

function output_txt = myfunction( obj,event_obj)
% Display the position of the data cursor
% obj          Currently not used (empty)
% event_obj    Handle to event object
% output_txt   Data cursor text string (string or cell array of strings).
% event_obj

dataIndex = get(event_obj,'DataIndex');
pos = get(event_obj,'Position');

output_txt = {[ 'X: ',num2str(pos(1),4)],...
    ['Y: ',num2str(pos(2),4)]};

try
    p=get(event_obj,'Target');
    output_txt{end+1} = ['SourceFileName: ',getappdata(p,'sourceFile_whatever')];
end


% If there is a Z-coordinate in the position, display it as well
if length(pos) > 2
    output_txt{end+1} = ['Z: ',num2str(pos(3),4)];
end