Find the coordinates of a point chosen on a plot
209 visualizzazioni (ultimi 30 giorni)
Mostra commenti meno recenti
Hello,
So I've been using ginput to select points on a plot
My plot consists of time(x) and velocity(y).
Below is my user-selected points.
[Userx,Usery] = ginput(1);
However, I noticed it doesn't actually select points from the voltage vs. time graph and instead just a point in the figure screen.
How can I get the nearest data point of the actual plot?
I've found one solution is to use this user created script file:
https://www.mathworks.com/matlabcentral/fileexchange/3265-magnetginput
1 Commento
Dinuka Madhumal
il 9 Mag 2023
Can anyone help me, what is the problem of this error - Undefined function or variable 'pdist2'. . Do i want to make the 'pdis2' function ?
Risposta accettata
darova
il 14 Nov 2019
Short example
x = linspace(0,2,20)'; % generate some data
y = sin(x);
plot(x,y,'.-b')
xy = ginput(1); % get point
[~,ix] = min(pdist2([x y],xy)); % find closest point
hold on
plot(x(ix),y(ix),'or') % display closest point
hold off
3 Commenti
Dinuka Madhumal
il 9 Mag 2023
Can anyone help me, what is the problem of this error - Undefined function or variable 'pdist2'. . Do i want to make the 'pdis2' function ?
Più risposte (1)
Fangjun Jiang
il 12 Nov 2019
Use data cursor, set "SnapToDataVertex" to be "on" and then get the position. See example in
doc datacursormode
Vedere anche
Categorie
Scopri di più su Line Plots in Help Center e File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!