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47 lines
1.6 KiB
47 lines
1.6 KiB
/*
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* ====================================================================
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* Licensed to the collaborators of the NPOI project under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership.
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* The collaborators license this file to You under the Apache License, Version 2.0
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* (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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* ====================================================================
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*/
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using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Text;
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using System.Threading.Tasks;
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namespace NPOI.SS.Formula.Functions
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{
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public sealed class VarP : NumberListFuncBase
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{
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public static readonly VarP Instance = new();
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private VarP()
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{
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}
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public override double CalculateFromNumberList(List<double> list)
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{
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if (list.Count == 1) return 0.0;
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var average = list.Average();
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var sum = 0.0;
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foreach (var item in list)
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{
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sum += Math.Pow(item - average, 2);
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}
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return sum / list.Count;
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}
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}
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}
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