シグモイド関数

sigmoid function

$ \sigma(x)=\frac{1}{1+e^{-x}}

https://gyazo.com/b95014a0da76b0542c51cd754f501cf6

code:sigmoid_plot.jl

using Plots

# シグモイド関数の描画

x = range(-10, stop=10, length=100)

y = 1 ./ (1 .+ exp.(-x))

plt = plot(x, y;

line=2,

xlims=(-10,10),

ylims=(0,1),

xlabel="",

ylabel="",

framestyle=:origin,

label="\$y=\\frac{1}{1+e^{-x}}\$"

)