private void DownloadDataset(string path)
{
if (!Directory.Exists(path))
{
Directory.CreateDirectory(path);
}
if (File.Exists(Path.Combine(path, MnistTrainingImages)) &&
File.Exists(Path.Combine(path, MnistTrainingLabels)))
{
Console.WriteLine("Dataset already downloaded.");
return;
}
string downloadPath = Path.Combine(path, "mnist.zip");
var downloader = new FileDownloader(ConsoleProgressWriter.Instance);
if (!downloader.DownloadAndExtract(MnistUrl, downloadPath, file =>
{
file.ExtractAll(path, ExtractExistingFileAction.OverwriteSilently);
}))
{
throw new InvalidOperationException("Failed to download MNIST");
}
}
/// <summary>
/// Tries to enable Math.NET native MKL provider. If not found and download is enabled, downloads
/// and exctracts MKL into [Retia.dll location]\x64.
/// </summary>
/// <param name="tryDownload">Whether MKL download is enabled.</param>
/// <param name="progressWriter">Progress writer.</param>
/// <returns>True if could use MKL provider, false otherwise.</returns>
public static bool TryUseMkl(bool tryDownload = true, IProgressWriter progressWriter = null)
{
if (Control.TryUseNativeMKL())
{
progressWriter?.Message("Using MKL.");
return(true);
}
if (!tryDownload)
{
progressWriter?.Message("Couldn't use MKL and download is disabled. Using slow math provider.");
return(false);
}
progressWriter?.Message("Couldn't use MKL right away, trying to download...");
string tempPath = Path.Combine(Path.GetTempPath(), FileName);
string extractDir = Path.Combine(Path.GetDirectoryName(Assembly.GetExecutingAssembly().Location), "x64");
var downloader = new FileDownloader(progressWriter);
if (!Directory.Exists(extractDir))
{
Directory.CreateDirectory(extractDir);
}
if (!downloader.DownloadAndExtract(MKLPackage, tempPath, file =>
{
var files = file.SelectEntries("*.*", @"build/x64");
foreach (var entry in files)
{
using (var stream = new FileStream(Path.Combine(extractDir, Path.GetFileName(entry.FileName)), FileMode.Create, FileAccess.Write))
{
entry.Extract(stream);
}
}
}, true))
{
return(false);
}
if (!Control.TryUseNativeMKL())
{
progressWriter?.Message("Still can't use MKL, giving up.");
return(false);
}
return(true);
}