[英]Removing data points at random
我正在生成一個模型列表,以模擬每天每分鍾收集一次的數據。 我想創建一些其他模型,並隨機刪除一些數據點。 有沒有辦法實現這種行為? 下面是我的代碼
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using MathNet.Numerics;
using MathNet.Numerics.Statistics;
public void dataGenerator()
{
int hrs = 24;
int minutes = 60;
int samplesize = hrs * minutes; // this is one day worth of data, with data created every minute
double mean = 50;
double stdev = 1;
int maxmodel = 10;
List<double[]> models = new List<double[]>();
List<double> modelaverage = new List<double>();
List<double> modelvariance = new List<double>();
// generating normal models with different mean / deviations
for (int i = 1; i <= maxmodel; i++)
{
//deviations are incremented by i, to create modles of different deviations, with every model having a different center by 2*i
double[] model = Generate.Normal(samplesize, mean + 2*i, stdev * i);
models.Add(model);
modelaverage.Add(model.Average());
modelvariance.Add(model.Variance());
}
}
只需添加以下代碼(我認為這很容易解釋):
Random rnd = new Random();
int RandomRemoveCount = 10;
for (int i = 0; i < Math.Min(models.Count, RandomRemoveCount); i++)
{
models.RemoveAt(rnd.Next(models.Count));
}
並將RandomRemoveCount
更改為要刪除的值。 Math.Min
是為了確保您刪除的內容不會超過實際數量。
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