Skip to content

Instantly share code, notes, and snippets.

@darkseed

darkseed/math_functions.scala

Created November 29, 2016 09:06
Show Gist options
  • Star 0 You must be signed in to star a gist
  • Fork 0 You must be signed in to fork a gist
  • Save darkseed/5bea55a6d6668dd33a356a666defc472 to your computer and use it in GitHub Desktop.
Save darkseed/5bea55a6d6668dd33a356a666defc472 to your computer and use it in GitHub Desktop.
Download ZIP
Raw
math_functions.scala
def sigmoid(x: Double) = 1.0 / (1.0 + math.exp(-x))
def f1measure(TP: Double, TN: Double, FP: Double, FN: Double, alpha: Double = 1) = {
val P = precision(TP, FP)
val R = recall(TP, FN)
(2.0 * P * R) / (P + R)
}
def precision(TP: Double, FP: Double) = TP / (FP + TP)
def recall(TP: Double, FN: Double) = TP / (FN + TP)
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment