How to add specified text to coordinates of points in "contour"?

Hi there,

I need to represent the specified points which I name as P1,P2...P25 for the coordinates of contour plot.

The attached figure further demostrates the requirement.

Can anyone help me to solve this issue?

Thank you.

Answer 1

[Mehmed Saad]

Here is a sample code

I hate putting comments in code so try to understand it.

[X,Y,Z] = peaks;
contour(X,Y,Z,20)
hold on
xl = xlim;yl = ylim;
no_of_points_x = 5;
no_of_points_y = 5;
locX = reshape(repmat(linspace(xl(1),xl(2),no_of_points_x),no_of_points_y,1).',no_of_points_x*no_of_points_y,[]);
locY = reshape(repmat(linspace(yl(1),yl(2),no_of_points_y),no_of_points_x,1),no_of_points_x*no_of_points_y,[]);
plot(locX,locY,'.','MarkerSize',80,'MarkerFaceColor',[0 0.4470 0.4470])
text(locX,locY,strcat('P',string(1:no_of_points_x*no_of_points_y)),'HorizontalAlignment','center','Color','y')
set(gca,'YDir','reverse')

[Ravindu Lokuliyana]

Thank you very much!!! This works perfect.