/// <summary>
/// Predict currency exchange rate based on last year data.
/// </summary>
/// <param name="openExchangeAppID">A valid app ID from Open Exchange Rates</param>
/// <param name="fromCurrency">Currency to exchange from (3-letter code)</param>
/// <param name="toCurrency">Currency to exchange to (3-letter code)</param>
/// <param name="dateToPredict">The date that needs to be predicted.</param>
/// <returns></returns>
public static double PredictCurrencyExchangeRate(string openExchangeAppID, string fromCurrency, string toCurrency, DateTime dateToPredict)
{
// Get last year rates
var oxrHelper = new OpenExchangeRates(openExchangeAppID);
var lastYearRates = oxrHelper.GetYearlyRates(fromCurrency, toCurrency, dateToPredict.AddYears(-1));
// Get predicted value
double predictedValue = LinearRegression.PredictCurrencyExchangeRate(
lastYearRates.Select(r => r.Key).ToArray(), lastYearRates.Select(r => r.Value).ToArray(), dateToPredict.Month);
return(predictedValue);
}
public static bool VerifyConnection(string appID)
{
try
{
OpenExchangeRates validation = new OpenExchangeRates(appID);
validation.GetRate("GBP", "USD");
}
catch (Exception e)
{
throw new MsgException("Your OpenExchangeRates App ID is invalid.");
}
return(true);
}
public OpenExchangeRatesTest()
{
openExchangeRate = new OpenExchangeRates("e4280622a7e442b9959a19f7e52745c1");
}