public CurrencyServiceTest()
{
//Configure DI
ServiceProviderDJ intstant = new ServiceProviderDJ();
serviceProvider = intstant.InitServices();
currencyService = serviceProvider.GetService <ICurrencyService>();
}
public LinearRegressionTest()
{
//Configure DI
ServiceProviderDJ intstant = new ServiceProviderDJ();
serviceProvider = intstant.InitServices();
linearRegression = serviceProvider.GetService <ILinearRegression>();
}
static async System.Threading.Tasks.Task Main(string[] args)
{
//Configure DI
ServiceProviderDJ intstant = new ServiceProviderDJ();
serviceProvider = intstant.InitServices();
var linearReg = serviceProvider.GetService <ILinearRegression>();
var currencyService = serviceProvider.GetService <ICurrencyService>();
int year = 0;
Console.WriteLine("Please input currency from: ");
var currencyFrom = Console.ReadLine();
Console.WriteLine("Please input currency to: ");
var currencyTo = Console.ReadLine();
Console.WriteLine("Please input Year here: ");
int.TryParse(Console.ReadLine(), out year);
Console.WriteLine("Please waiting for retrive data...");
var lstRates = await currencyService.QueryAndBindData(year, currencyFrom.ToUpper(), currencyTo.ToUpper());
double[] xMonth = { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12 };
double[] yRate = new double[13];
yRate = lstRates.ToArray();
if (xMonth.Length != yRate.Length)
{
Console.WriteLine("Month values should be with the same length with Rate.");
}
// xMonth,yRate are the coordinates of any point on the line
// a is the slope of the line
// b is the y - intercept
var a = linearReg.Slope(xMonth, yRate);
var b = linearReg.Intercept(xMonth, yRate);
Console.WriteLine("slope is: " + a);
Console.WriteLine("Intercept is: " + b);
for (int i = 0; i < xMonth.Length; i++)
{
// Slope * month + intercept
var predictedValue = (a * xMonth[i]) + b;
Console.WriteLine($"Prediction currency exchange from {currencyFrom} to {currencyTo} for 15/{xMonth[i]}/{year}: {predictedValue}");
}
}
