Drag a point on a curve

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David Arnold
David Arnold on 3 Mar 2018
Answered: Sujit Muduli on 6 Mar 2018
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.

Answers (1)

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