Data update

Task/Euler-method/Pluto/euler-method.pluto

@@ -0,0 +1,25 @@
+local fmt = require "fmt"
+
+local function euler(f, y, step, finish)
+    fmt.write(" Step %2d: ", step)
+    for t = 0, finish, step do
+        if t % 10 == 0 then fmt.write(" %7.3f", y) end
+        y += step * f(y)
+    end
+    print()
+end
+
+local function analytic()
+    io.write("    Time: ")
+    for t = 0, 100, 10 do fmt.write(" %7d", t) end
+    io.write("\nAnalytic: ")
+    for t = 0, 100, 10 do
+        fmt.write(" %7.3f", 20 + 80 * math.exp(-0.07 * t))
+    end
+    print()
+end
+
+local cooling = |temp| -> -0.07 * (temp - 20)
+
+analytic()
+for {2, 5, 10} as i do euler(cooling, 100, i, 100) end