Drag a point on a curve

Here is my code:

xmin=0;xmax=3;
ymin=0;ymax=3;

x=linspace(xmin,xmax);
y=1/3*x.^2;
plot(x,y)

hold on
plot(1.5,1/3*1.5^2,'o',...
    'MarkerFaceColor','r')
hold on
plot([0,1.5,1.5],[1/3*1.5^2,1/3*1.5^2,0],'r--')
quiver(0,0,0,1/3*1.5^2,0,...
    'LineWidth',1,...
    'Color','black')
quiver(0,0,1.5,0,0,...
    'LineWidth',1,...
    'Color','black')
quiver(0,0,1.5,1/3*1.5^2,0,...
    'LineWidth',1,...
    'Color','black')

grid on

hold off

shg

Which produces this image:

Is it possible to write the code so that I can use my mouse to drag the point on the curve and get it coordinates as it moves. Then I want to update my arrows and dashed lines.

If it is not possible to drag the point, then can you show me how to use a slider to move the point, get its coordinates, and update my arrows and dashed lines.

Answer 1

[Sujit Muduli]

Hi David,

You may find the link below relevant to what you are asking for, please have a look at it. https://in.mathworks.com/matlabcentral/answers/94353-how-can-i-select-multiple-points-using-the-data-cursor-and-export-the-coordinates-to-the-matlab-work

Thanks,

Sujit