Labelling plot lines akin to contour labels

Question

Steven White 2011-8-17

2
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/13893-labelling-plot-lines-akin-to-contour-labels

评论： Sandeep K 2018-2-22

Dear Matlab Community,

I would like to annotate a simple 2D plot line in a similar way to how contour levels are labelled in contour. That is, the line appears broken with some label text centred on the line. The idea here is that one could label multiple plots neatly, without the use of a legend.

Does anybody know a way to do this? Obviously, one could use annotation, but setting this up in a generic way could prove to be difficult (at least for me).

Cheers, Steven.

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

Fangjun Jiang 2011-8-17

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/13893-labelling-plot-lines-akin-to-contour-labels#answer_19010

在 MATLAB Online 中打开

I don't know any way directly. All I can suggest is to look at contour.m to see if you can make you own. Share with us if you do find a way.

Find this interesting note in contour.m. Might it give you some leads? The function is in clabel.m

%   Thanks to R. Pawlowicz (IOS) rich@ios.bc.ca for 'contours.m' and 
%   'clabel.m/inline_labels' so that contour now works with parametric
%   surfaces and inline contour labels.
t=0:0.1:7;
y=sin(t);
z=cos(t);
plot(t,t,'r',t,y,'g',t,z,'b',t,y+z,'k');
Strings={'line','sin','cos','sin+cos'};
LabelLine(gca,Strings);
function LabelLine(h_axes,LabelStrings)
h_line=findobj(h_axes,'type','line');
n=length(h_line);
for k=1:n;
    XData=get(h_line(k),'XData');
    YData=get(h_line(k),'YData');
    Ind=round(length(XData)/2);
    text(XData(Ind),YData(Ind),LabelStrings{n-k+1});
end