Accord.Tests.Statistics.NewtonRaphsonCoxLearningTest.KaplanMeierTest C# (CSharp) Method

        public void KaplanMeierTest()
        {
            double[,] data =
            {
                //  time censor
                {    1,    0   }, // died at time 1
                {    2,    1   }, // lost at time 2
                {    3,    0   }, // died at time 3
                {    5,    0   }, // died at time 5
                {    7,    1   }, // lost at time 7
                {   11,    0   }, // ...
                {    4,    0   },
                {    6,    0   },
                {    8,    0   },
                {    9,    1   },
                {    10,   1   },
            };

            double[] time = data.GetColumn(0);
            int[] censor = data.GetColumn(1).ToInt32();

            var regression = new ProportionalHazards(inputs: 0);

            var target = new ProportionalHazardsNewtonRaphson(regression)
            {
                Estimator = HazardEstimator.KaplanMeier
            };

            double error = target.Run(time, censor);

            Assert.AreEqual(-5.7037824746562009, error);
        }
    }