Options for displaying data by clicking on a marker in a plot

Hello,

is there an option for displaying data in addition to the usual x and y data by clicking on a marker in a plot?

I've plottet the coordinates of broken particles in the xy-plane and I want to display their ID in addition to their respective coordinates. The ID should be disyplayed in the same window as the x and y value (see attachement).

Answer 1

[Tommy]

For R2018b and later:

X = rand(10,1);
Y = rand(10,1);
IDs = randi(100,10,1);

s = scatter(X, Y, 'x');
s.DataTipTemplate.DataTipRows(3) = dataTipTextRow('ID', IDs);

For R2018a and earlier, something similar to this:

X = rand(10,1);
Y = rand(10,1);
IDs = randi(100,10,1);

f = figure;
scatter(X, Y, 'x');

dcm = datacursormode(f);
dcm.UpdateFcn = {@customDataTip, IDs};

function txt = customDataTip(~, eventData, IDs)
    s = eventData.Target;
    pos = eventData.Position;
    ID = IDs(s.XData == pos(1) & s.YData == pos(2));
    valueFormat = ' \color[rgb]{0 0.6 1}\bf';
    removeValueFormat = '\color[rgb]{.25 .25 .25}\rm';
    txt = {['X',[valueFormat num2str(pos(1)) removeValueFormat]],...
           ['Y',[valueFormat num2str(pos(2)) removeValueFormat]],...
           ['ID',[valueFormat num2str(ID) removeValueFormat]]};
end

[Paul]

Hi Tommy,

thank you for your solution.

Is it possible to display the entries of the ID column (see attached brokenPart.txt file)? The given code displays the indizes of the ID-column as IDs.

[Tommy]

Hmm, I might've messed up somewhere but I'm having a hard time figuring out where. Which answer did you use? And could you provide the code you're using to load and plot your data?

[Paul]

I've implemented your first answer. The used .txt files are attached and the complete code is the following:

clear all
clc

%Importing data from walls.txt:
A1 = importdata('walls.txt ');

A = A1.data(1:256,:);

%Importing data from brokenPart.txt
A2 = importdata('brokenPart.txt');
P = A2.data;

Ax = A(:,5);
Ay = A(:,6);
Az = A(:,7);
Bx = A(:,8);
By = A(:,9);
Bz = A(:,10);
Cx = A(:,11);
Cy = A(:,12);
Cz = A(:,13);

x = [Ax; Bx; Cx];
y = [Ay; By; Cy];
z = [Az; Bz; Cz];

Px = P(:,9);
Py = P(:,10);
Pz = P(:,11);
tsim = P(:,1);

figure(1)
plot([min(x),max(x)],[min(z),min(z)],'-k','LineWidth',2) 
hold on
plot([max(x),max(x)],[min(z),max(z)],'-k','LineWidth',2);
plot([max(x),min(x)],[max(z),max(z)],'-k','LineWidth',2); 
plot([min(x),min(x)],[max(z),min(z)],'-k','LineWidth',2); 
s = scatter(Px,Pz,50,tsim,'x');
s.DataTipTemplate.DataTipRows(3) = dataTipTextRow('ID', A(:,2));
hold off
xlabel('x [m]');
ylabel('z [m]'); 
c = colorbar;   
c.Label.String = 'tsim [s]'; 

figure(2)
plot(Ax,Ay,'-k','LineWidth',2) 
hold on
s = scatter(Px,Py,50,tsim,'x'); 
s.DataTipTemplate.DataTipRows(3) = dataTipTextRow('ID', A(:,2));
hold off
xlabel('x [m]'); 
ylabel('y [m]');
c = colorbar;   
c.Label.String = 'tsim [s]'; 

[Tommy]

Assuming your IDs are contained in the second column of brokenParts.txt and not walls.txt, I believe you should pull them from P rather than A. For example:

s.DataTipTemplate.DataTipRows(3) = dataTipTextRow('ID', P(:,2));

You're currently grabbing the IDs from walls.txt - it just so happens that the second column of walls.txt contains row numbers, making the 'IDs' seem like indices.

[Paul]

Hi Tommy,

your solution works exactly as it should. Thank you very much for the support.

[Tommy]

Happy to help!