From 67f4d79c4a2fc9842f051ae827be5819e07d97a1 Mon Sep 17 00:00:00 2001
From: matthieugomez <gomez.matthieu@gmail.com>
Date: Thu, 8 Apr 2021 10:11:09 -0700
Subject: [PATCH] simpler formula for yhat

---
 src/recipes.jl | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/src/recipes.jl b/src/recipes.jl
index c804c745..952bf0aa 100644
--- a/src/recipes.jl
+++ b/src/recipes.jl
@@ -191,10 +191,8 @@ end
     @series begin
         ()
     end
-    X = hcat(ones(length(x)), x)
-    yhat = X * (X'X \ X'y)
     @series begin
-        y := yhat
+        y := mean(y) .+ cov(x, y) / var(x) .* (x .- mean(x))
         seriestype := :path
         label := ""
         primary := false