S函数 Sigmoid Function or Logistic Function

S函数 Sigmoid Function or Logistic Function

octave代码

x = -10:0.1:10;
y = zeros(length(x), 1);

for i = 1:length(x)
	y(i) = 1 / (1 + exp(-x(i)));

end

figure;
plot(x, y, '-b', 'LineWidth', 2);