Javascript Python 翻译 excel trend 函数

用Python 实现 excel中 trend函数实现预测数据

Python 版本

def leastSquaresFitLinear(known_y, known_x, offset_x):if len(known_y) != len(known_x):return 0num_points = len(known_y)x1 = y1 = xy = x2 = j = m = b = 0.0for i in range(num_points):known_x[i] -= offset_xx1 = x1 + known_x[i]y1 = y1 + known_y[i]xy = xy + known_x[i] * known_y[i]x2 = x2 + known_x[i] * known_x[i]j = (num_points * x2) - (x1 * x1)if j != 0.0:m = ((num_points * xy) - (x1 * y1)) / jb = ((y1 * x2) - (x1 * xy)) / jelse:b = y1 / 2return bif __name__ == '__main__':print(leastSquaresFitLinear([120.931851, 120.931851], [1.416, 1.416], 1.416))print(leastSquaresFitLinear([120.934185, 120.934185], [0.835, 0.84], 0.836))print(leastSquaresFitLinear([120.827912, 120.827961], [1.892, 1.897], 1.894))print(leastSquaresFitLinear([30.558758, 30.558756], [1.892, 1.897], 1.894))print(leastSquaresFitLinear([6.990148, 6.9], [1.892, 1.897], 1.894))

Javascript 版本

function LeastSquaresFitLinear(known_y, known_x, offset_x)
{if (known_y.length != known_x.length) return false; //("arrays are unequal lengths");var numPoints = known_y.length;var x1=0, y1=0, xy=0, x2=0, J, M, B;for (var i = 0; i < numPoints; i++){known_x[i] -= offset_x;x1 = x1 + known_x[i];y1 = y1 + known_y[i];xy = xy + known_x[i] * known_y[i];x2 = x2 + known_x[i] * known_x[i];}J = (numPoints * x2) - (x1 * x1);if (J != 0.0){M = ((numPoints * xy) - (x1 * y1)) / J;B = ((y1 * x2) - (x1 * xy)) / J;}return [M,B];
}

C# 版本

public static partial class Math2
{public static double[] Trend(double[] known_y, double[] known_x, params double[] new_x){// return array of new y valuesdouble m, b;Math2.LeastSquaresFitLinear(known_y, known_x, out m, out b);List<double> new_y = new List<double>();for (int j = 0; j < new_x.Length; j++){double y = (m * new_x[j]) + b;new_y.Add(y);}return new_y.ToArray();}// found at http://stackoverflow.com/questions/7437660/how-do-i-recreate-an-excel-formula-which-calls-trend-in-c// with a few modificationspublic static void LeastSquaresFitLinear(double[] known_y, double[] known_x, out double M, out double B){if (known_y.Length != known_x.Length){throw new ArgumentException("arrays are unequal lengths");}int numPoints = known_y.Length;//Gives best fit of data to line Y = MC + Bdouble x1, y1, xy, x2, J;x1 = y1 = xy = x2 = 0.0;for (int i = 0; i < numPoints; i++){x1 = x1 + known_x[i];y1 = y1 + known_y[i];xy = xy + known_x[i] * known_y[i];x2 = x2 + known_x[i] * known_x[i];}M = B = 0;J = ((double)numPoints * x2) - (x1 * x1);if (J != 0.0){M = (((double)numPoints * xy) - (x1 * y1)) / J;//M = Math.Floor(1.0E3 * M + 0.5) / 1.0E3; // TODO this is disabled as it seems to product results different than excelB = ((y1 * x2) - (x1 * xy)) / J;// B = Math.Floor(1.0E3 * B + 0.5) / 1.0E3; // TODO assuming this is the same as above}}}

Javascript Python 翻译 excel trend 函数相关推荐

python char 相等_用 Python 实现 Excel文本函数
用 Python 实现 Excel文本函数 Excel 是非常强大的电子表格软件,大家日常经常用 Excel 处理成绩.师生名单.分析数据等,对 Excel 的函数比较了解,通过用 Python 实现 ...
python 对excel的函数操作_自动化报表（3）
1. # 方法1 # openpyxl模块中的Comment()函数,给单元格添加批注 import pandas as pd from openpyxl import Workbook from o ...
python 对excel的函数操作（2）
1.用pandas的二维数组做除法运算,替换inf,过滤inf等操作 import pandas as pd import numpy as np# 用pandas科学数据库操作excel # 用pa ...
python打开excel的函数-Python读取excel文件中带公式的值的实现
在进行excel文件读取的时候,我自己设置了部分直接从公式获取单元格的值但是用之前的读取方法进行读取的时候,返回值为空 import os import xlrd from xlutils.copy ...
excel 批量翻译-excel 批量函数公司翻译大全免费
excel 批量翻译,我们经常会需要Excel文档内容进行批量翻译,大多数人只会把内容复制粘贴到百度/谷歌或有道翻译,少数同学会输入公式翻译但是翻译出来的内容质量不是特别好,且中途还要去写函数代码.今 ...
PYTHON 调用EXCEL VBA 函数：使用win32com模块
import win32com.clientdef excel_VBA():xls=win32com.client.Dispatch('Excel.Application')xls.Workbooks ...
python效仿excel日期函数（edate，eomonth）
# -*- coding:utf-8 -*- # author:yr007 time: 2020-01-12import datetime import calendarclass DateCalcu ...
python 标准库 excel_Python 操作 Excel 的函数库
1. Python 操作 Excel 的函数库我主要尝试了 3 种读写 Excel 的方法: 1> xlrd, xlwt, xlutils: 这三个库的好处是不需要其它支持,在任何操作系统上都 ...
用python处理excel的基本语法_Python-高级-实用-操作 Excel
版权声明:本文为博主原创文章,遵循CC BY-NC-ND 4.0 版权协议,转载请附上原文出处链接和本声明. Python-高级-实用-操作 Excel 缘起 Excel 是我们日常工作学习中都会使用 ...
什么是SUM函数以及如何在Python，Excel和Mathlab中使用？
SUM is the short form of the summation which is a mathematical operation. SUM is a very popular term ...

Javascript Python 翻译 excel trend 函数

Javascript Python 翻译 excel trend 函数相关推荐

最新文章

热门文章