Data update

Task/Feigenbaum-constant-calculation/Pluto/feigenbaum-constant-calculation.pluto

@@ -0,0 +1,29 @@
+local fmt = require "fmt"
+
+local function feigenbaum()
+    local max_it = 13
+    local max_it2 = 10
+    local a1 = 1
+    local a2 = 0
+    local d1 = 3.2
+    print(" i       d")
+    for i = 2, max_it do
+        local a = a1 + (a1 - a2) / d1
+        for _ = 1, max_it2 do
+            local x = 0
+            local y = 0
+            for __ = 1, 1 << i do
+                y = 1 - 2 * y * x
+                x = a - x * x
+            end
+            a -= x / y
+        end
+        local d = (a1 - a2) / (a - a1)
+        fmt.print("%2d    %0.8f", i, d)
+        d1 = d
+        a2 = a1
+        a1 = a
+    end
+end
+
+feigenbaum()