L Membership function

alpha=30;
beta = 50;
for i=1:10
  x(i) = i*5
  if x(i)<=alpha
    y(i)=1;
  elseif x(i)<=beta
    y(i) = (beta-x(i))/(beta-alpha);
  else
     y(i)=0
  end
end
plot(x,y)
x
y