AForge.MachineLearning.RouletteWheelExploration.ChooseAction C# (CSharp) Method

        public int ChooseAction( double[] actionEstimates )
        {
            // actions count
            int actionsCount = actionEstimates.Length;
            // actions sum
            double sum = 0, estimateSum = 0;

            for ( int i = 0; i < actionsCount; i++ )
            {
                estimateSum += actionEstimates[i];
            }

            // get random number, which determines which action to choose
            double actionRandomNumber = rand.NextDouble( );

            for ( int i = 0; i < actionsCount; i++ )
            {
                sum += actionEstimates[i] / estimateSum;
                if ( actionRandomNumber <= sum )
                    return i;
            }

            return actionsCount - 1;
        }
    }