tanh

tanh is a scaled and shifted version of the sigmoid, as
  f = "<<src-eval-elisp(data=(cached-file "rPUfdpr.svg"))>>"
using Plots
x = range(-10, 10, length=100)
y = tanh.(x)
plot(x, y)
savefig(f)
f

broken link: file:/home/mahmooz/brain/out/rPUfdpr.svg