223*_*112 2 matlab plot matlab-figure
我需要能够以编程方式从x轴值的数组列表中设置数据提示。例如,我创建一个图形并绘制数据。
figure;plot(t1,[filter(b,a,Gyro(:,2)),filter(b,a,Gyro(:,4))])
我有一组来自t1变量(时间)的时间戳记值(例如[0.450, 0.854, 1.2343....]),我想在其中放置数据提示以标记数据中的某些事件。无需每次都单击并保存数据行就放置手册...如何将它们作为数组传递,并通过matlab脚本以编程方式进行?
您可以通过编程方式添加matlab datatip并在一定程度上自定义它们。
下面的函数显示了如何添加一些数据提示,放置它们以及自定义它们的显示:

该演示的代码(将其保存在文件中demo_datatip.m并运行以获取上图):
function h = demo_datatip
%// basic sample curve
npts = 600 ;
x = linspace(0,4*pi,npts) ;
y = sin(x) ;
%// plot
h.fig = figure ;
h.ax = axes ;
h.plot = plot(x,y) ;
%// simulate some event times
time_events = x([25 265 442]) ; %// events type 1 at index 25, 265 and 422
%// define the target line for the new datatip
hTarget = handle(h.plot);
%// Add the datatip array
h.dtip = add_datatips( time_events , hTarget ) ;
function hdtip = add_datatips( evt_times , hTarget )
%// retrieve the datacursor manager
cursorMode = datacursormode(gcf);
set(cursorMode, 'UpdateFcn',@customDatatipFunction, 'NewDataCursorOnClick',false);
xdata = get(hTarget,'XData') ;
ydata = get(hTarget,'YData') ;
%// add the datatip for each event
for idt = 1:numel(evt_times)
hdtip(idt) = cursorMode.createDatatip(hTarget) ;
set(hdtip(idt), 'MarkerSize',5, 'MarkerFaceColor','none', ...
'MarkerEdgeColor','r', 'Marker','o', 'HitTest','off');
%// move it into the right place
idx = find( xdata == evt_times(idt) ) ;%// find the index of the corresponding time
pos = [xdata(idx) , ydata(idx) ,1 ];
update(hdtip(idt), pos);
end
function output_txt = customDatatipFunction(~,evt)
pos = get(evt,'Position');
idx = get(evt,'DataIndex');
output_txt = { ...
'*** !! Event !! ***' , ...
['at Time : ' num2str(pos(1),4)] ...
['Value: ' , num2str(pos(2),8)] ...
['Data index: ',num2str(idx)] ...
};
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如果您需要删除数据提示,则只需调用delete(datatip_handle)它的句柄(甚至是一组句柄即可在group中删除它们)。