Annotate multipl plots with text

Hello everyone! I am required to annotate multiple line plots with the numbers as can be seen in the figure. I have put the numbers between the lines using 'plot edit toolbar', but I wish to do it in the code. I have tried many commands like annotation, text, ds2nfu, but all commands requires x and y coordinates for the location of annotation. I just need a number, which is unique to that particular line plot to be printed in the manner as can be seen in the figure. Is there any way wherein I can insert these numbers to the respective plots without extracting the location data? Because, I wont be aware of the x and y most of the times! Your inputs are welcome! Thank you in advance!

Answer 1

[Thorsten]

Well, you are aware of the x and y pos, because you can plot the line. You can do the following

 x = 1:10+randi(10);
 y = [rand*x; rand*x; rand*x; rand*x];
 plot(x,y')

 ind = round([0.5 0.55 0.6 0.65]*numel(x)); % specify the x positions
 labels = {'36' '40' '44' '42'}; % the labels of the lines
 for i =1:numel(ind)
   text(x(ind(i)), y(i, ind(i)), labels{i})
 end

[Karthik Brs]

Hello Thorsten, Thank you for your time! I don't know the x and y data in the sense, I may get other text files, with different x and y data. So, I want to write a code which is general and should work on any range of values (irrespective of x and y coordinate data) . I want the annotations for the line and not for the coordinates! Hope you understood my requirement!

[Thorsten]

You could specify the xpos as

xpos = round([0.5 0.6 0.7]*numel(x));

Then the labels are plotted at 50%, 60% and 70% the length of the x coordinates, at the corresponding y values of the lines. I modified my example for random x and y to show that it works. Is this what you need?

[Karthik Brs]

Mmmm.. Let me attach my my workspace variable here. Even after I ran the code with your modified input, the was able to get the numbers on to the graphs, but they not in the visible location. The code which I am using is given below,

 %%Campbell diagram
             t1 = cell2mat(tempLw(1));  t2 = cell2mat(tempLw(2));
             t3 = cell2mat(tempLw(3));  t4 = cell2mat(tempLw(4));
             figure(50);
             wf = waterfall([a1 a1 a1 a1]',[F1 F2 F3 F4]',[t1 t2 t3 t4]');
             view([0 90]);  %Sets the default viewport to X-Y plane
             xlabel('RPM','FontSize',12,'Fontweight','bold');
             ylabel('Frequency','FontSize',12,'Fontweight','bold');
             title('Campbell diagram','FontSize',16,'Fontweight','bold');
             cb = colorbar('eastoutside');
             set(get(cb,'title'),'string','Schalleistung in dB');
             set(wf,'Linewidth',4);
             hold on
             grid on               
             plot(a1,F1,'k',a1,F2,'k',a1,F3,'k',a1,F4,'k','Linewidth',0.001);

[Thorsten]

Use

x = a1;
y = [F1 F2 F3 F4]';

and run the modified code above, starting from the fifth line

 ind = ....

[Karthik Brs]

Works like a charm! Thanks a ton!! :)