How to find coordinate if only x is given?

Hello,

Let's assume that we have a surface given by triangular mesh with nodal coordinates [ID, x,y,z]. The surface is circular plate with diameter 200mm. I would like to ask you how to find coordinates x,y and their id which is as close to R = 75 mm as possible.

Best regards

Mathew

Answer 1

[KSSV]

Rm = sqrt(x.^2+y.^2) ; % get radius from mexh (x,y) 
R = 75 ;
tol = 10^-3 ; 
idx = find(abs(Rm-R)<tol) ;
iwant = [idx x(idx) y(idx)]