Data update

Task/Cumulative-standard-deviation/Pluto/cumulative-standard-deviation.pluto

@@ -0,0 +1,18 @@
+require "table2"
+local fmt = require "fmt"
+
+local function cum_std_dev(a)
+    for i = 1, #a do
+        local b = a:slice(1, i)
+        fmt.print("Values  : %,s", b)
+        coroutine.yield(b:stddev())
+    end
+end
+
+local a = {2, 4, 4, 4, 5,  5, 7, 9}
+local co = coroutine.create(cum_std_dev)
+while true do
+    local _, sd = coroutine.resume(co, a)
+    if !sd then break end
+    fmt.print("Std Dev : %10.8f\n", sd)
+end