Finding of value coordinate

For example,

x=-50:1:50;
y=4*x.^2+5;
plot(x,y,'*-')

How we can find x value corresponding to the minimum value of y.

[Walter Roberson]

http://www.mathworks.co.uk/matlabcentral/answers/43073-a-guide-to-tags

Answer 1

[Walter Roberson]

[~, idx] = min(y);
x(idx)