% Mineshaft Function # 1
% Range of initial points: 0 <= x <= 10
% Global minima: x=5
% f(x)=1.380487165157852
% Coded by: Ali R. Alroomi | Last Update: 14 Feb. 2015 | www.al-roomi.org
 
clear
clc
warning off
 
xmin=0;
xmax=10;
R=100000; % steps resolution
x=xmin:(xmax-xmin)/R:xmax;
    
for i=1:length(x)
    f(i)=cos(x(i))+abs(((7-x(i))^(2/15)))+2*abs(((5-x(i))^(4/35)));
end
 
plot(x,f,'r','LineWidth',2);grid;set(gca,'FontSize',12);
xlabel('x','FontName','Times','FontSize',20,'FontAngle','italic');
ylabel('f(x)','FontName','Times','FontSize',20,'FontAngle','italic');