Draw sigmoid function by matplotlib

sigmoid_plot.py

sigmoid = lambda x: 1 / (1 + np.exp(-x))
x=linspace(-10,10,10)
y=linspace(-10,10,100)
plot(x,sigmoid(x),'r', label='linspace(-10,10,10)')
plot(y,sigmoid(y),'b', label='linspace(-10,10,100)')
grid()
xlabel('X Axis')
ylabel('Y Axis')
title('Sigmoid Function')
suptitle('Sigmoid')

text(4,0.8,r'$\sigma(x)=\frac{1}{1+e^{-x}}$',fontsize=15)

legend(loc='lower right')

gca().xaxis.set_major_locator(MultipleLocator(1))
gca().yaxis.set_major_locator(MultipleLocator(0.1))

legend(bbox_to_anchor=(0.5, -0.2), loc='center', borderaxespad=0)

subplots_adjust(bottom=0.22)