/// <summary>
/// Handle BuildModel event from View
/// </summary>
/// <returns> Result View showing F1Score and Accuracy </returns>
public async Task <ActionResult> TrainModel()
{
// Read data from CSV file
IDataView data = MLHelpers.ReadFromCsv();
data = AppContext.MlContext.Data.Cache(data);
// Pre-processing data before training
IDataView cleanData = MLHelpers.PrepareData(data);
// use FastTree Model
var modelEstimator = AppContext.MlContext.BinaryClassification.Trainers.FastTree();
// cross-validation
var cvResults = AppContext.MlContext.BinaryClassification.CrossValidateNonCalibrated(cleanData, modelEstimator, numberOfFolds: 4);
// get the best model from 4 fold models
double[] f1Score = cvResults
.OrderByDescending(fold => fold.Metrics.F1Score)
.Select(fold => fold.Metrics.F1Score)
.ToArray();
double[] accuracy = cvResults
.OrderByDescending(fold => fold.Metrics.Accuracy)
.Select(fold => fold.Metrics.Accuracy)
.ToArray();
ITransformer[] models = cvResults
.OrderByDescending(fold => fold.Metrics.Accuracy)
.Select(fold => fold.Model)
.ToArray();
BinaryClassificationMetrics[] metrics = cvResults
.OrderByDescending(fold => fold.Metrics.Accuracy)
.Select(fold => fold.Metrics)
.ToArray();
// Get Top Model
ITransformer topModel = models[0];
MLResultViewModel resultView = new MLResultViewModel
{
accuracy = f1Score[0],
f1score = accuracy[0]
};
return(View("Result", resultView));
}
/// <summary>
/// Handle Get More Data event in View
/// </summary>
/// <returns> Index View </returns>
public async Task <ActionResult> GetData()
{
// execute async task with callback to avoid blocking the web app
_ = FhirService.GetData().ContinueWith((data) =>
{
// Write fetched data to csv file
MLHelpers.WriteToCsv(data.Result);
// Save new fetched data to AppContext
foreach (Patient p in data.Result)
{
AppContext.AnalysisData.AddPatient(p);
}
});
return(View("Index"));
}
public CollapsingView(Context context, IAttributeSet attrs = null, int defStyleAttr = 0) : base(context, attrs, defStyleAttr)
{
if (expandDrawable == null)
{
expandDrawable = GetDrawable(Resource.Drawable.ic_expand_more_black_24dp);
collapseDrawable = GetDrawable(Resource.Drawable.ic_expand_less_black_24dp);
}
var titleView = context.GetSystemService <LayoutInflater>(Context.LayoutInflaterService).Inflate(Resource.Layout.collapse_header, this);
titleTextView = titleView.FindViewById <TextView>(Resource.Id.text);
iconView = titleView.FindViewById <ImageView>(Resource.Id.icon);
iconView.SetImageDrawable(expandDrawable);
titleView.Click += delegate { Toggle(); };
Orientation = Orientation.Vertical;
ChildViewAdded += (sender, args) => args.Child.Visibility = isExpanded ? ViewStates.Visible : ViewStates.Gone;
var padding = MLHelpers.DpToPixelsInt(5);
SetPadding(padding, padding, padding, padding);
}
public override RecyclerView.ViewHolder OnCreateViewHolder(ViewGroup parent, int viewType)
{
var inflater = activity.LayoutInflater;
View view;
switch (viewType)
{
case 0:
view = inflater.Inflate(Android.Resource.Layout.SimpleListItem1, parent, false);
var text = view.FindViewById <TextView>(Android.Resource.Id.Text1);
text.SetTextAppearance(activity, Android.Resource.Attribute.TextAppearanceLarge);
var value = new TypedValue();
activity.Theme.ResolveAttribute(Resource.Attribute.colorAccent, value, true);
text.SetTextColor(new Color(value.Data));
return(new ViewHolder(view));
default:
view = inflater.Inflate(Android.Resource.Layout.SimpleListItem2, parent, false);
view.FindViewById <TextView>(Android.Resource.Id.Text2).SetTextAppearance(activity, Android.Resource.Attribute.TextAppearanceMedium);
view.SetPaddingRelative(MLHelpers.DpToPixelsInt(20), view.PaddingTop, view.PaddingEnd, view.PaddingBottom);
return(new ViewHolder(view));
}
}
private async Task <bool> AddProfile(SpannableStringBuilder builder, TagNode node, IDictionary <int, Bitmap> inlines, LinearLayout parent, GravityFlags gravity)
{
if (!layoutTags.Contains(node.Tag.Name))
{
return(false);
}
AddTextView(builder, parent, gravity);
var parameter = node.AttributeValues.Count > 0 ? node.AttributeValues.Values.First() : null;
LinearLayout newParent;
switch (node.Tag.Name)
{
case "collapse":
newParent = new CollapsingView(Activity)
{
LayoutParameters = defaultLayoutParams, Title = parameter
};
break;
case "indent":
newParent = new LinearLayout(Activity)
{
LayoutParameters = defaultLayoutParams, Orientation = Orientation.Vertical
};
newParent.SetPaddingRelative(MLHelpers.DpToPixelsInt(10), 0, 0, 0);
break;
case "left":
case "center":
case "right":
newParent = new LinearLayout(Activity)
{
LayoutParameters = defaultLayoutParams, Orientation = Orientation.Vertical
};
gravity = node.Tag.Name == "center" ? GravityFlags.Center : node.Tag.Name == "right" ? GravityFlags.End : GravityFlags.Start;
newParent.SetHorizontalGravity(gravity);
break;
case "hr":
var value = new TypedValue();
Activity.Theme.ResolveAttribute(Resource.Attribute.colorAccent, value, true);
var hr = new View(Activity)
{
LayoutParameters = new LinearLayout.LayoutParams(ViewGroup.LayoutParams.MatchParent, MLHelpers.DpToPixelsInt(2))
};
hr.SetBackgroundColor(new Color(value.Data));
parent.AddView(hr);
return(true);
case "heading":
var heading = new TextView(Activity)
{
LayoutParameters = new LinearLayout.LayoutParams(ViewGroup.LayoutParams.WrapContent, ViewGroup.LayoutParams.WrapContent)
{
BottomMargin = MLHelpers.DpToPixelsInt(5)
},
Text = node.ToText()
};
heading.SetTextSize(ComplexUnitType.Sp, 22);
parent.AddView(heading);
return(true);
case "img":
var image = new ImageView(Activity)
{
LayoutParameters = new LinearLayout.LayoutParams(ViewGroup.LayoutParams.WrapContent, ViewGroup.LayoutParams.WrapContent)
};
image.SetImageBitmap(inlines[int.Parse(parameter)]);
parent.AddView(image);
return(true);
case "quote":
newParent = new LinearLayout(Activity)
{
LayoutParameters = defaultLayoutParams, Orientation = Orientation.Vertical
};
var padding = MLHelpers.DpToPixelsInt(5);
newParent.SetPadding(padding, padding, padding, padding);
newParent.SetBackgroundResource(Resource.Drawable.background_quote);
var text = new TextView(Activity)
{
LayoutParameters = new LinearLayout.LayoutParams(ViewGroup.LayoutParams.WrapContent, ViewGroup.LayoutParams.WrapContent)
{
BottomMargin = MLHelpers.DpToPixelsInt(5)
},
Text = Strings.Profile_Quote
};
text.SetTypeface(null, TypefaceStyle.Bold);
newParent.AddView(text);
return(true);
default:
return(false);
}
parent.AddView(newParent);
var remaining = await BBCodeBinding.GetFormatted(node, (n, b) => AddProfile(b, n, inlines, newParent, gravity));
AddTextView(remaining, newParent, gravity);
return(true);
}
private static async Task <bool> ApplyCustomHandlers(SpannableStringBuilder builder, TagNode node, Func <TagNode, SpannableStringBuilder, Task <bool> > customHandler)
{
if (customHandler != null && await customHandler(node, builder))
{
return(true);
}
var start = builder.Length();
var parameter = node.AttributeValues.Count > 0 ? node.AttributeValues.Values.First() : null;
switch (node.Tag.Name)
{
case "session":
builder.Append(" " + parameter);
builder.SetSpan(new ImageSpan(sessionIcon.Value), start, start + 1, SpanTypes.MarkMark);
builder.SetSpan(new ClickableSpan(view => {
var channel = parameter;
var channelManager = Mvx.GetSingleton <IChannelManager>();
if (channelManager.JoinedChannels.ContainsKey(channel))
{
ViewChannel(channel);
return;
}
NotifyCollectionChangedEventHandler listener = null;
listener = (sender, args) => {
if (args.Action != NotifyCollectionChangedAction.Add || args.NewItems.Cast <Channel>().All(x => x.Name != channel))
{
return;
}
ViewChannel(channel);
channelManager.JoinedChannels.CollectionChanged -= listener;
};
channelManager.JoinedChannels.CollectionChanged += listener;
channelManager.JoinChannel(channel);
}), start + 1, builder.Length(), 0);
return(true);
case "icon":
case "eicon":
builder.Append(' ');
var icon = node.Tag.Name == "icon" ? Helpers.GetAvatar(node.ToText()) : $"https://static.f-list.net/images/eicon/{node.ToText()}.gif";
var image = new BitmapDrawable(await Mvx.GetSingleton <IMvxImageCache <Bitmap> >().RequestImage(icon));
var size = MLHelpers.DpToPixelsInt(40);
image.SetBounds(0, 0, size, size);
builder.SetSpan(new ImageSpan(image), start, start + 1, 0);
return(true);
case "user":
var name = node.ToText();
builder.Append(" " + name);
var character = Mvx.GetSingleton <ICharacterManager>().GetCharacter(name);
builder.SetSpan(new ImageSpan(StatusIconConverter.GetDrawable(character.Status)), start, start + 1, SpanTypes.MarkMark);
builder.SetSpan(new PureClickableSpan(view => {
Mvx.GetSingleton <IViewModelNavigator>().Show <CharacterViewModel, string>(character.Name);
}), start, builder.Length(), 0);
builder.SetSpan(new ForegroundColorSpan(new Color(CharacterViewModel.GetColor(character).ARGB)), start + 1, builder.Length(), 0);
if (character.IsBookmarked || character.IsFriend)
{
builder.SetSpan(new ColoredUnderlineSpan(unchecked ((int)0xff00cc00)), start + 1, builder.Length(), 0);
}
return(true);
default:
return(false);
}
}
