add standard deviation

oganm · Aug 31, 2022 · 9391b2f · 9391b2f
1 parent f0d295a
commit 9391b2f
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Showing 2 changed files with 7 additions and 1 deletion.
diff --git a/addons/dice_syntax/dice_syntax.gd b/addons/dice_syntax/dice_syntax.gd
@@ -110,6 +110,12 @@ static func expected_value(probs:Dictionary)->float:
 		out += probs[k]*float(k)
 	return(out)
 
+static func standard_deviation(probs:Dictionary)->float:
+	var out = 0
+	var mean = expected_value(probs)
+	for k in probs.keys():
+		out += pow(float(k)-mean,2)*probs[k]
+	return pow(out,0.5)
 
 static func roll_from_probs(probs:Dictionary,rng:RandomNumberGenerator,n=1)->Array:
 	var al = preload('array_logic.gd')

diff --git a/addons/dice_syntax/plugin.cfg b/addons/dice_syntax/plugin.cfg
@@ -3,5 +3,5 @@
 name="dice_syntax"
 description="Dice rolling syntax"
 author="Ogan Mancarci"
-version="2.1.3"
+version="2.2.0"
 script="plugin.gd"