public void Run(double[] input, int correct, bool testing)
{
//Forward
Layers[0].Calculate(input, NumLayers == 1);
for (int i = 1; i < Layers.Count; i++)
{
Layers[i].Calculate(Layers[i - 1].Values, i == Layers.Count - 1);
}
if (!testing)
{
//Backprop
for (int i = NumLayers - 1; i >= 0; i--)
{
bool isoutput = i == Layers.Count - 1;
iLayer outputlayer = isoutput ? null : Layers[i + 1];
double[] inputvals = i == 0 ? input : Layers[i - 1].Values;
Layers[i].Backprop(inputvals, outputlayer, isoutput, correct);
}
}
//Report values
Guess = -1; double certainty = -5; double error = 0;
for (int i = 0; i < 10; i++)
{
if (Layers[Layers.Count - 1].Values[i] > certainty)
{
Guess = i; certainty = Layers[Layers.Count - 1].Values[i];
}
error += ((i == correct ? 1d : 0d) - Layers[Layers.Count - 1].Values[i]) * ((i == correct ? 1d : 0d) - Layers[Layers.Count - 1].Values[i]);
}
error = Math.Sqrt(error);
TrialNum++;
PercCorrect = (PercCorrect * ((TrialNum) / (TrialNum + 1))) + ((Guess == correct) ? (1 / (TrialNum)) : 0d);
Error = (Error * ((TrialNum) / (TrialNum + 1))) + (error * (1 / (TrialNum)));
}
private Dictionary <string, string> GetFieldValues(object sender)
{
iLayer layer = (iLayer)sender;
var parameters = new Dictionary <string, string>(layer.ActionParameters);
foreach (Fieldset fieldset in layer.Items.OfType <Fieldset>())
{
System.Console.WriteLine(fieldset.Header);
foreach (Field field in fieldset.Fields)
{
System.Console.WriteLine(field.Label);
if (field is SelectListField)
{
SelectListField listField = (SelectListField)field;
for (int i = 0; i < listField.Items.Count; i++)
{
System.Console.WriteLine((i + 1) + ". " + listField.Items[i].Value);
}
var item = listField.Items[Convert.ToInt32(System.Console.ReadLine()) - 1];
parameters[listField.ID + ".Key"] = item.Key;
parameters[listField.ID] = item.Value;
}
else
{
parameters[field.ID] = System.Console.ReadLine();
}
}
}
return(parameters);
}
public void PopToLayer(iLayer layer)
{
if (layer != null)
{
PopToView(layer.View);
}
}
/// <summary>
/// Outputs a layer to the WPF target.
/// </summary>
/// <param name="layer">The layer.</param>
protected override bool OnOutputLayer(iLayer layer)
{
if (!_windowInited)
{
InitializeWindow();
}
if (layer == null)
{
return(false);
}
if (layer is LoginLayer)
{
new LoginControl(layer as LoginLayer).Show();
return(true);
}
if (layer is Browser)
{
var uri = ((Browser)layer).Url;
MainWindow.IsEnabled = true;
IsBusy = false;
const string imageScheme = "image://";
const string audioPlaybackScheme = "audio://";
const string videoPlaybackScheme = "video://";
const string voiceScheme = "voicerecording://";
const string videoRecordingScheme = "videorecording://";
if (uri.StartsWith(imageScheme))
{
new ImagePicker(layer.NavContext, HttpUtility.ParseQueryString(uri.Substring(imageScheme.Length)));
return(true);
}
else if (uri.StartsWith(audioPlaybackScheme))
{
//AudioPlaybackExtensions.Launch(url);
}
else if (uri.StartsWith(voiceScheme))
{
//AudioRecordingExtensions.Launch(url);
}
else if (uri.StartsWith(videoPlaybackScheme))
{
//VideoPlaybackExtensions.Launch(url);
}
else if (uri.StartsWith(videoRecordingScheme))
{
//VideoRecordingExtensions.Launch(url);
}
else if (uri.StartsWith("tel"))
{
BrowserView.Launch(uri);
return(true);
}
}
return(base.OnOutputLayer(layer));
}
public void PopToLayer(iLayer layer)
{
var view = _views.FirstOrDefault(v => v.GetModel().Equals(layer));
if (view != null)
{
PopToView(view);
}
}
/// <summary>
/// Called when an <see cref="iLayer" /> instance is ready to be outputted. Override this method in a subclass
/// in order to handle layer types that cannot be handled by the available abstract objects.
/// </summary>
/// <param name="layer">The layer to be outputted.</param>
/// <returns>
/// <c>true</c> if layer output was handled and the factory should not attempt to output it as a controller; otherwise <c>false</c>.
/// </returns>
protected override bool OnOutputLayer(iLayer layer)
{
var browser = layer as Core.Layers.Browser;
if (browser == null || browser.Url.StartsWith("http") || browser.Url.StartsWith("data"))
{
return(false);
}
return(base.OnOutputLayer(layer) || HandleUrl(new Link(browser.Url), true, null));
}
protected override object OnGetCustomItem(ICustomItem item, iLayer layer, IListView view, object recycledCell)
{
var cell = GetNativeObject <FrameworkElement>(Converter.ConvertToCell(item, layer.LayerStyle, view, null), "item", true);
if (CustomItemRequested != null)
{
return(CustomItemRequested(item, layer));
}
return(cell);
}
protected override object OnGetCustomItem(ICustomItem item, iLayer layer, IListView view, object recycledCell)
{
if (CustomItemRequested == null)
{
return(base.OnGetCustomItem(item, layer, view, recycledCell));
}
var custom = recycledCell as CustomItemContainer;
return(CustomItemRequested(item, custom?.CustomItem as View, layer));
}
public void Clear(iLayer layer)
{
if (layer == null)
{
PopToRoot();
}
else
{
PopToLayer(layer);
}
}
protected override object OnGetCustomItem(ICustomItem item, iLayer layer, IListView view, object recycledCell)
{
var controller = GetNativeObject <UIViewController>(view, "view") as UITableViewController;
var cell = GetNativeObject <UITableViewCell>(Converter.ConvertToCell(item, layer.LayerStyle, view, null), "item");
if (CustomItemRequested != null)
{
return(CustomItemRequested(item, cell, controller == null ? null : controller.TableView));
}
return(cell);
}
protected override object OnGetCustomItem(ICustomItem item, iLayer layer, IListView view, object recycledCell)
{
var ci = GetCustomItem;
if (ci != null)
{
return(ci(item, layer, view, recycledCell as Control));
}
#pragma warning disable 618
var cir = CustomItemRequested;
return(cir == null ? null : cir(item, layer.LayerStyle));
#pragma warning restore 618
}
/// <summary>
/// Renders the specified <see cref="iLayer"/> instance on the screen.
/// </summary>
/// <param name="layer">A <see cref="iLayer"/> representing the Layer value.</param>
/// <param name="navigatedUri">A <see cref="String"/> that represents the uri used to navigate to the layer.</param>
/// <exception cref="ArgumentNullException">Thrown when the <paramref name="layer"/> is <c>null</c>.</exception>
public void OutputLayer(iLayer layer, string navigatedUri)
{
if (layer == null)
{
throw new ArgumentNullException("layer");
}
Thread.ExecuteOnMainThread(() =>
{
if (!OnOutputLayer(layer))
{
OutputController(layer, layer.Name, navigatedUri);
}
else
{
StopBlockingUserInput();
}
});
}
/// <summary>
/// Generates an <see cref="IMXView"/> instance that visually and functionally replicates the layer.
/// </summary>
/// <param name="layer">The layer from which the view will be generated.</param>
/// <returns>The view that was generated.</returns>
public static IMXView GetView(this iLayer layer)
{
if (layer is NavigationTabs)
{
return(GetTabView((NavigationTabs)layer));
}
if (layer is Browser)
{
return(GetBrowserView((Browser)layer));
}
if (layer is LoginLayer)
{
return(GetLoginView((LoginLayer)layer));
}
return(GetListView(layer));
}
protected override bool OnOutputLayer(iLayer layer)
{
var browser = layer as Browser;
if (browser != null)
{
string url = browser.Url;
if (url.StartsWith("image") ||
url.StartsWith("geoloc") ||
url.StartsWith("compass") ||
url.StartsWith("accel") ||
url.StartsWith("video") ||
url.StartsWith("audio") ||
url.StartsWith("voice"))
{
//TODO: Launch integration
return(true);
}
}
return(false);
}
protected override bool OnOutputLayer(iLayer layer)
{
if (layer is LoginLayer)
{
((LoginLayer)layer).Display();
return(true);
}
if (layer is CameraScanLayer)
{
CameraScannerView.Scan(layer as CameraScanLayer);
return(true);
}
if (layer is ScanLayer)
{
ScannerView.Scan((ScanLayer)layer);
return(true);
}
return(HandleIntegration(layer as Browser) || base.OnOutputLayer(layer));
}
internal void LayerLoadCompleted(iLayer layer)
{
bool output = true;
if (Device.Reflector.GetMethod(GetType(), "OnLayerLoading", typeof(iLayer)).DeclaringType != typeof(iApp))
{
output = false;
OnLayerLoading(layer);
}
var handler = OnLayerLoadComplete;
if (handler != null)
{
output = false;
handler(layer);
}
if (output)
{
Factory.OutputLayer(layer);
}
}
/// <summary>
/// Outputs a layer to the console platform.
/// </summary>
/// <param name="layer">The layer.</param>
protected override bool OnOutputLayer(iLayer layer)
{
layer.NavContext.NavigatedUrl = LastAddress ?? string.Empty;
page = 0;
searchTerm = string.Empty;
if (navHistory.Contains(layer))
{
navHistory.Pop().Unload();
while (navHistory.Count > 1 && navHistory.Peek() != layer)
{
navHistory.Pop();
}
}
else
{
navHistory.Push(layer);
}
DisplayLayer(layer);
return(true);
}
public void Backprop(double[] input, iLayer outputlayer, bool uselessbool, int uselessint)
{
//Calc errors
if (outputlayer is FullyConnectedLayer)
{
var FCLOutput = outputlayer as FullyConnectedLayer;
Errors = new double[Length];
for (int k = 0; k < FCLOutput.Length; k++)
{
for (int j = 0; j < Length; j++)
{
Errors[j] += FCLOutput.Weights[k, j] * Maths.TanhDerriv(outputlayer.ZVals[k]) * FCLOutput.Errors[k];
}
}
}
if (outputlayer is ConvolutionLayer)
{
var CLOutput = outputlayer as ConvolutionLayer;
Errors = Maths.Convert(CLOutput.FullConvolve(CLOutput.Weights, Maths.Convert(CLOutput.Errors)));
}
if (outputlayer is PoolingLayer)
{
var PLOutput = outputlayer as PoolingLayer;
int iterator = 0;
Errors = new double[Length];
for (int i = 0; i < Length; i++)
{
if (PLOutput.Mask[i] == 0)
{
continue;
}
Errors[i] = PLOutput.Errors[iterator];
iterator++;
}
}
//There are no gradient with respect to a pooling layer
}
protected void OutputForm(iLayer layer, Fieldset fieldset)
{
System.Console.WriteLine();
Link link = layer.ActionButtons.FirstOrDefault(b => b.Action == iFactr.Core.Controls.Button.ActionType.Submit);
if (link == null)
{
return;
}
link = (Link)link.Clone();
layer.FieldValuesRequested -= GetFieldValues;
layer.FieldValuesRequested += GetFieldValues;
var parameters = layer.GetFieldValues();
if (link.Parameters == null)
{
link.Parameters = parameters;
}
else
{
foreach (var key in parameters.Keys)
{
link.Parameters[key] = parameters[key];
}
}
if (link.RequestType == RequestType.ClearPaneHistory)
{
ClearHistory();
}
iApp.Navigate(link);
}
public void LoadLayer(iLayer navLayer, Dictionary <String, String> parameters)
{
LoadLayer(null, navLayer, null, parameters);
}
/// <summary>
/// Called when an application layer begins loading. This method is meant to be overridden in consuming applications
/// for notification when a layer is loaded as an alternative to using events.
/// </summary>
/// <param name="layer">An <see cref="iLayer"/> representing the layer being loaded.</param>
public virtual void OnLayerLoading(iLayer layer)
{
}
private void DisplayLayer(iLayer layer)
{
LastAddress = layer.NavContext.NavigatedUrl;
ResetNavigationKeys();
System.Console.Title = TheApp.Title;
System.Console.Clear();
if (!string.IsNullOrEmpty(layer.Title))
{
System.Console.WriteLine(layer.Title);
}
if (layer is NavigationTabs)
{
OutputTabs((NavigationTabs)layer);
}
else
{
foreach (var item in layer.Items)
{
if (item is iBlock)
{
OutputBlock((iBlock)item);
}
else if (item is iPanel)
{
OutputPanel((iPanel)item);
}
else if (item is iList)
{
OutputList((iList)item);
}
else if (item is iMenu)
{
OutputMenu((iMenu)item);
}
else if (item is Fieldset)
{
OutputForm(layer, (Fieldset)item);
}
}
OutputActions(layer.ActionButtons);
}
if (layer.BackButton != null && layer.BackButton.Action != iFactr.Core.Controls.Button.ActionType.None)
{
layer.BackButton.Address = TheApp.NavigateOnLoad;
}
System.Console.WriteLine();
System.Console.WriteLine("0. {0} ...", GetResourceString("Back") ?? "Back");
System.Console.WriteLine();
string input = System.Console.ReadLine();
Link action = new Link(TheApp.NavigateOnLoad);
try
{
int key = Convert.ToInt16(input);
if (key == 0 && navHistory.Count > 1)
{
navHistory.Pop().Unload();
var nextLayer = navHistory.Peek();
DisplayLayer(nextLayer);
}
action = navigationKeys[key];
}
catch
{
action = new Link(input == string.Empty ? TheApp.NavigateOnLoad : input);
}
if (action.Address != null && action.Address.StartsWith("##"))
{
if (action.Address == "##PREV##")
{
page--;
}
else if (action.Address == "##NEXT##")
{
page++;
}
else if (action.Address == "##SEARCH##")
{
System.Console.Write("{0}: ", GetResourceString("SearchHint") ?? "Search");
input = System.Console.ReadLine();
searchTerm = input;
page = 0;
}
else if (action.Address == "##CLEAR##")
{
searchTerm = string.Empty;
page = 0;
}
DisplayLayer(layer);
return;
}
if (!string.IsNullOrEmpty(action.ConfirmationText))
{
System.Console.Write(action.ConfirmationText + " (y/N) ");
string confirm = System.Console.ReadLine();
if (confirm.ToLower().Trim()[0] != 'y')
{
DisplayLayer(layer);
return;
}
}
System.Console.WriteLine();
LastAddress = action.Address;
if (action.RequestType == RequestType.ClearPaneHistory)
{
ClearHistory();
}
iApp.Navigate(action);
}
private static IListView GetListView(iLayer layer)
{
var view = new ListView <iLayer>(layer, layer.Layout == LayerLayout.Rounded ? ListViewStyle.Grouped : ListViewStyle.Default);
var popover = layer as IPopoverLayer;
view.PopoverPresentationStyle = popover != null && popover.IsFullscreen ||
layer.PopoverPresentationStyle == PopoverPresentationStyle.FullScreen ?
PopoverPresentationStyle.FullScreen : PopoverPresentationStyle.Normal;
view.Activated += ViewActivated;
view.Deactivated += ViewDeactivated;
view.Rendering += (o, e) =>
{
layer = view.GetModel() as iLayer;
if (layer == null)
{
return;
}
layer.FieldValuesRequested -= GetFieldValues;
layer.FieldValuesRequested += GetFieldValues;
view.StackID = layer.Name ?? layer.GetType().FullName;
view.Title = layer.Title;
view.TitleColor = layer.LayerStyle.HeaderTextColor;
view.HeaderColor = layer.LayerStyle.HeaderColor;
view.SeparatorColor = layer.LayerStyle.SeparatorColor;
view.BackLink = layer.BackButton;
view.OutputPane = layer.NavContext.OutputOnPane;
((IHistoryEntry)view).ShouldNavigate = layer.ShouldNavigateFrom;
view.ColumnMode = (ColumnMode)layer.CompositeLayerLayout;
if (layer.LayerStyle.LayerBackgroundImage != null)
{
view.SetBackground(layer.LayerStyle.LayerBackgroundImage, ContentStretch.Fill);
}
else
{
view.SetBackground(layer.LayerStyle.LayerBackgroundColor);
}
var searchList = layer.Items.OfType <SearchList>().FirstOrDefault();
if (searchList != null)
{
var searchBox = new SearchBox();
searchBox.SearchPerformed += (sender, args) =>
{
if (layer == null)
{
return;
}
for (int i = 0; i < layer.Items.Count; i++)
{
var list = layer.Items[i] as SearchList;
if (list == null)
{
continue;
}
list.PerformSearch(layer.NavContext.NavigatedUrl, args.SearchText);
view.Sections[i].ItemCount = list.Count;
}
view.ReloadSections();
};
searchBox.BorderColor = layer.LayerStyle.SectionHeaderColor;
searchBox.Placeholder = iApp.Factory.GetResourceString("SearchHint");
searchBox.Text = searchList.SearchText;
view.SearchBox = searchBox;
if (searchList.AutoFocus)
{
searchBox.Focus();
}
}
if (layer.ActionButtons != null && layer.ActionButtons.Count > 0)
{
var menu = new Menu();
if (menu != null)
{
menu.BackgroundColor = layer.LayerStyle.HeaderColor;
menu.ForegroundColor = layer.LayerStyle.HeaderTextColor;
foreach (var button in layer.ActionButtons)
{
var item = new MenuButton(button.Text);
if (item == null)
{
continue;
}
item.NavigationLink = button;
item.ImagePath = button.Image == null ? null : button.Image.Location;
menu.Add(item);
}
view.Menu = menu;
}
}
else
{
view.Menu = null;
}
int sectionIndex = 0;
view.Sections.Clear();
for (int i = 0; i < layer.Items.Count; i++)
{
var item = layer.Items[i];
var aggregate = iApp.Factory.Target == MobileTarget.Windows ? item as AggregateFieldset : null;
if (aggregate != null && aggregate.AggregateHeader == null && i > 0 && layer.Items[i - 1] is AggregateFieldset)
{
aggregate.SectionIndex = -1;
continue;
}
item.SectionIndex = sectionIndex++;
var section = new Section {
ItemCount = (item is IList && aggregate == null) ? ((IList)item).Count : 1,
};
if (aggregate != null && aggregate.AggregateHeader == null)
{
section.Header = null;
}
else if (item.Header == null)
{
section.Header = null;
}
else
{
if (section.Header == null)
{
section.Header = new SectionHeader();
}
section.Header.BackgroundColor = layer.LayerStyle.SectionHeaderColor;
section.Header.ForegroundColor = layer.LayerStyle.SectionHeaderTextColor;
section.Header.Text = aggregate == null ? item.Header : aggregate.AggregateHeader;
}
if (item.Footer == null)
{
section.Footer = null;
}
else
{
if (section.Footer == null)
{
section.Footer = new SectionFooter();
}
section.Footer.BackgroundColor = layer.LayerStyle.SectionHeaderColor;
section.Footer.ForegroundColor = layer.LayerStyle.SectionHeaderTextColor;
section.Footer.Text = item.Footer;
}
view.Sections.Add(section);
}
if (layer.FocusedItem != null)
{
for (int i = 0; i < layer.Items.Count; i++)
{
var item = layer.Items[i];
if (item == layer.FocusedItem)
{
view.ScrollToCell(i, 0, false);
break;
}
var list = item as IList;
if (list != null)
{
int index = list.IndexOf(layer.FocusedItem);
if (index >= 0)
{
view.Metadata["NextField"] = list[index];
view.ScrollToCell(i, index, false);
}
}
}
}
};
view.Submitting += (o, e) =>
{
e.Cancel = true;
layer = view.GetModel() as iLayer;
if (layer == null)
{
return;
}
var values = layer.GetFieldValues();
layer.Validate(values);
if (layer.IsValid)
{
foreach (var key in values.Keys)
{
e.DestinationLink.Parameters[key] = values[key];
}
iApp.Navigate(e.DestinationLink, view);
}
else
{
view.Render();
new Alert(iApp.Factory.GetResourceString("ValidationFailure"), string.Empty, AlertButtons.OK).Show();
}
};
((IListView)view).ItemIdRequested = (section, index) =>
{
layer = view.Model;
if (layer == null)
{
return(0);
}
var item = iApp.Factory.Target == MobileTarget.Windows ?
layer.Items.SingleOrDefault(i => i.SectionIndex == section) : layer.Items.ElementAtOrDefault(section);
if (item == null)
{
return(0);
}
if (iApp.Factory.Target == MobileTarget.Windows && item is AggregateFieldset)
{
return(item.SectionIndex);
}
var list = item as IList;
if (list == null)
{
return(item.GetType().Name.GetHashCode());
}
var obj = list[index];
var textField = obj as TextField;
var hashCode = (textField != null && textField.IsPassword) ? "PasswordField".GetHashCode() : obj.GetType().Name.GetHashCode();
if (Device.Platform == MobilePlatform.Android && (obj is TextField || obj is SelectListField))
{
hashCode = (hashCode + 1) * 31 + section.GetHashCode();
hashCode = hashCode * 31 + index.GetHashCode();
}
return(hashCode);
};
((IListView)view).CellRequested = (section, index, recycledCell) =>
{
layer = view.Model;
if (layer != null)
{
var item = layer.Items.ElementAtOrDefault(section);
#region Aggregate Fieldsets
if (iApp.Factory.Target == MobileTarget.Windows)
{
AggregateFieldset aggregate = null;
try
{
item = layer.Items.SingleOrDefault(i => i.SectionIndex == section);
}
catch
{
int sectionIndex = 0;
for (int i = 0; i < layer.Items.Count; i++)
{
var li = layer.Items[i];
aggregate = li as AggregateFieldset;
if (aggregate != null && aggregate.AggregateHeader == null && i > 0 && layer.Items[i - 1] is AggregateFieldset)
{
aggregate.SectionIndex = -1;
continue;
}
li.SectionIndex = sectionIndex++;
if (li.SectionIndex == section)
{
item = li;
}
}
}
aggregate = item as AggregateFieldset;
if (aggregate != null)
{
index = layer.Items.IndexOf(aggregate);
int count = 1;
for (int i = index + 1; i < layer.Items.Count; i++)
{
var fieldset = layer.Items[i] as AggregateFieldset;
if (fieldset == null || fieldset.AggregateHeader != null)
{
break;
}
count++;
}
return(iApp.Factory.Converter.ConvertToCell(layer.Items.GetRange(index, count).Cast <AggregateFieldset>(), layer.LayerStyle, view, recycledCell));
}
}
#endregion
var list = item as IList;
object cell = null;
if (list == null)
{
cell = item;
}
else if (index >= 0 && index < list.Count)
{
cell = list[index];
}
if (cell is ICustomItem)
{
return(new CustomItemContainer(iApp.Factory.OnGetCustomItem((ICustomItem)cell, layer, view, recycledCell)));
}
return(cell == null ? null : iApp.Factory.Converter.ConvertToCell(cell, layer.LayerStyle, view, recycledCell));
}
return(null);
};
return(view);
}
/// <summary>
/// Called when an <see cref="ICustomItem"/> instance is ready to be rendered and a native object is needed for insertion into the view.
/// </summary>
/// <param name="item">The item that is ready to be rendered.</param>
/// <param name="layer">The layer instance associated with the item, or <c>null</c> if the item is not associated with a layer.</param>
/// <param name="view">The view that will contain the item.</param>
/// <param name="recycledCell">An already instantiated cell that is ready for reuse, or <c>null</c> if no cell has been recycled.</param>
/// <returns>The object that will be inserted into the view.</returns>
protected internal virtual object OnGetCustomItem(ICustomItem item, iLayer layer, IListView view, object recycledCell)
{
return(Converter.ConvertToCell(item, layer.LayerStyle, view, recycledCell as ICell));
}
/// <summary>
/// Called when an <see cref="iLayer"/> instance is ready to be outputted. Override this method in a subclass
/// in order to handle layer types that cannot be handled by the available abstract objects.
/// </summary>
/// <param name="layer">The layer to be outputted.</param>
/// <returns><c>true</c> if layer output was handled and the factory should not attempt to output it as a controller; otherwise <c>false</c>.</returns>
protected virtual bool OnOutputLayer(iLayer layer)
{
var browser = layer as Browser;
if (browser != null && browser.Url != null)
{
int index = browser.Url.IndexOf(':');
if (index < 0)
{
return(false);
}
switch (browser.Url.Substring(0, index))
{
case "accel":
var parameters = HttpUtility.ParseQueryString(browser.Url.Substring(browser.Url.IndexOf('?')));
string callback = parameters == null ? null : parameters.GetValueOrDefault("callback");
if (callback == null)
{
throw new ArgumentException("Accelerometer requires a callback URI.");
}
var accel = new Accelerometer();
accel.ValuesUpdated += (o, e) =>
{
lock (accel)
{
if (accel.IsActive)
{
accel.Stop();
iApp.Navigate(callback, new Dictionary <string, string>()
{
{ "X", e.Data.X.ToString() },
{ "Y", e.Data.Y.ToString() },
{ "Z", e.Data.Z.ToString() },
});
}
}
};
accel.Start();
return(true);
case "compass":
parameters = HttpUtility.ParseQueryString(browser.Url.Substring(browser.Url.IndexOf('?')));
callback = parameters == null ? null : parameters.GetValueOrDefault("callback");
if (callback == null)
{
throw new ArgumentException("Compass requires a callback URI.");
}
var compass = new Compass();
compass.HeadingUpdated += (o, e) =>
{
lock (compass)
{
if (compass.IsActive)
{
compass.Stop();
iApp.Navigate(callback, new Dictionary <string, string>()
{
{ "Bearing", e.Data.TrueHeading.ToString() },
});
}
}
};
compass.Start();
return(true);
case "geoloc":
parameters = HttpUtility.ParseQueryString(browser.Url.Substring(browser.Url.IndexOf('?')));
callback = parameters == null ? null : parameters.GetValueOrDefault("callback");
if (callback == null)
{
throw new ArgumentException("Geolocation requires a callback URI.");
}
var geoloc = new GeoLocation();
geoloc.LocationUpdated += (o, e) =>
{
lock (geoloc)
{
if (geoloc.IsActive)
{
geoloc.Stop();
iApp.Navigate(callback, new Dictionary <string, string>()
{
{ "Lat", e.Data.Latitude.ToString() },
{ "Lon", e.Data.Longitude.ToString() }
});
}
}
};
geoloc.Start();
return(true);
}
}
return(false);
}
/// <summary>
/// Renders the specified <see cref="iLayer"/> instance on the screen.
/// </summary>
/// <param name="layer">A <see cref="iLayer"/> representing the Layer value.</param>
/// <exception cref="ArgumentNullException">Thrown when the <paramref name="layer"/> is <c>null</c>.</exception>
public void OutputLayer(iLayer layer)
{
OutputLayer(layer, LastNavigationUrl);
}
/// <summary>
/// Backpropegation of error and calcluation of gradients
/// </summary>
/// <param name="input">Previous layer's values</param>
/// <param name="isoutput">Whether the layer is the output layer</param>
public void Backprop(double[] input, iLayer outputlayer, bool isoutput, int correct)
{
//Calculate error
if (isoutput)
{
Errors = new double[Length];
for (int i = 0; i < Length; i++)
{
Errors[i] = 2d * (Values[i] - (i == correct ? 1d : 0d));
}
}
else
{
if (outputlayer is FullyConnectedLayer)
{
var FCLOutput = outputlayer as FullyConnectedLayer;
Errors = new double[Length];
for (int k = 0; k < FCLOutput.Length; k++)
{
for (int j = 0; j < Length; j++)
{
Errors[j] += FCLOutput.Weights[k, j] * Maths.TanhDerriv(outputlayer.ZVals[k]) * FCLOutput.Errors[k];
}
}
}
if (outputlayer is ConvolutionLayer)
{
var CLOutput = outputlayer as ConvolutionLayer;
Errors = Maths.Convert(CLOutput.FullConvolve(CLOutput.Weights, Maths.Convert(CLOutput.Errors)));
}
if (outputlayer is PoolingLayer)
{
var PLOutput = outputlayer as PoolingLayer;
int iterator = 0;
Errors = new double[Length];
for (int i = 0; i < Length; i++)
{
if (PLOutput.Mask[i] == 0)
{
continue;
}
Errors[i] = PLOutput.Errors[iterator];
iterator++;
}
}
}
//Calculate gradients
for (int i = 0; i < Length; i++)
{
for (int ii = 0; ii < InputLength; ii++)
{
//Weight gradients
WeightGradient[i, ii] = -1 * input[ii] * Maths.TanhDerriv(ZVals[i]) * Errors[i];
if (NN.UseMomentum)
{
if (NN.UseNesterov)
{
//Nesterov momentum formula
WeightGradient[i, ii] = ((1 + NN.Momentum) * (NN.LearningRate * WeightGradient[i, ii]))
+ (NN.Momentum * NN.Momentum * WMomentum[i, ii]);
}
else
{
//Standard momentum formula
WeightGradient[i, ii] = (WMomentum[i, ii] * NN.Momentum) + (NN.LearningRate * WeightGradient[i, ii]);
}
//Momentum is the previous iteration's gradient
WMomentum[i, ii] = WeightGradient[i, ii];
}
}
if (isoutput)
{
continue;
}
//Bias gradients
BiasGradient[i] = -1 * Maths.TanhDerriv(ZVals[i]) * Errors[i];
if (NN.UseMomentum)
{
if (NN.UseNesterov)
{
BiasGradient[i] = ((1 + NN.Momentum) * (NN.LearningRate * BiasGradient[i]))
+ (NN.Momentum * NN.Momentum * BMomentum[i]);
}
else
{
BiasGradient[i] = (BMomentum[i] * NN.Momentum) + (NN.LearningRate * BiasGradient[i]);
}
//Momentum is the previous iteration's gradient
BMomentum[i] = BiasGradient[i];
}
}
}
public void PopToLayer(iLayer layer)
{
var display = ViewControllers.OfType <IMXView>().First(vc => layer.Equals(vc.GetModel()));
PopToViewController(display as UIViewController, true);
}
public virtual void Clear(iLayer layer)
{
PopToRoot();
}
/// <summary>
/// Loads the specified layer with the specified parameters.
/// </summary>
/// <param name="fromView">The <see cref="IMXView"/> instance from which the navigation was initiated.</param>
/// <param name="navLayer">The <see cref="iLayer"/> instance to load.</param>
/// <param name="navigatedUri">A <see cref="String"/> that represents the uri used to navigate to the layer.</param>
/// <param name="parameters">A <see cref="Dictionary<TKey, TValue>"/> representing the parameters to pass to the layer's Load method.</param>
internal virtual void LoadLayer(IMXView fromView, iLayer navLayer, string navigatedUri, Dictionary <String, String> parameters)
{
TryLoadController(this, fromView, navLayer, navigatedUri, parameters);
}