add xy coordinates to a graph
33 vues (au cours des 30 derniers jours)
Afficher commentaires plus anciens
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/150225/image.jpeg)
hi, i have a graph like this picture, local maxmimus are shown with red points, but i also would like to show the related xy coordinates on graph by adding commands to existing code,not with data curser. please help me if you can
0 commentaires
Réponse acceptée
Image Analyst
le 1 Oct 2013
Do you mean you just want to put a text label near it?
indexToLabel = 42; % or whatever.
textString = sprintf('x = %.2f, y = %.2f', x(indexToLabel), y(indexToLabel));
text(x(indexToLabel), y(indexToLabel), textString);
Adjust the x, and y as necessary in text() to move the location of the label.
4 commentaires
Image Analyst
le 22 Août 2019
Put \n into the string:
numPoints = 20;
x = sort(rand(1, numPoints));
y = rand(1, numPoints);
plot(x, y, 'b.-', 'MarkerSize', 25);
grid on;
[~, indexToLabel] = max(y); % label the highest point, or whatever you want.
textString = sprintf('x = %.2f\ny = %.2f', x(indexToLabel), y(indexToLabel));
text(x(indexToLabel), y(indexToLabel), textString, 'FontSize', 20, 'Color', 'r');
![0001 Screenshot.png](https://www.mathworks.com/matlabcentral/answers/uploaded_files/235017/0001%20Screenshot.png)
Plus de réponses (0)
Voir également
Catégories
En savoir plus sur Title dans Help Center et File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!