private async void trackbar_ValueChanged(object sender, EventArgs e)
{
var trackBar = sender as DensityTrackbar;
if (trackBar == null)
{
return;
}
sharedFixedVariables.SetVariableValue((double)trackBar.Value, variableNames[trackbars.IndexOf(trackBar)], 0);
await _partialDependencePlot.RecalculateAsync();
}
void UpdateCursor()
{
var x = VerticalLineAnnotation.X;
sharedFixedVariables.SetVariableValue(x, FreeVariable, 0);
if (ShowCursor)
{
chart.Titles[0].Text = FreeVariable + " : " + x.ToString("N3", CultureInfo.CurrentCulture);
chart.Update();
}
OnVariableValueChanged(this, EventArgs.Empty);
}
private void SampleTrainingData(MersenneTwister rand, ModifiableDataset ds, int rRows,
IDataset sourceDs, double[] curTarget, string targetVarName, IEnumerable <int> trainingIndices)
{
var selectedRows = trainingIndices.SampleRandomWithoutRepetition(rand, rRows).ToArray();
int t = 0;
object[] srcRow = new object[ds.Columns];
var varNames = ds.DoubleVariables.ToArray();
foreach (var r in selectedRows)
{
// take all values from the original dataset
for (int c = 0; c < srcRow.Length; c++)
{
var col = sourceDs.GetReadOnlyDoubleValues(varNames[c]);
srcRow[c] = col[r];
}
ds.ReplaceRow(t, srcRow);
// but use the updated target values
ds.SetVariableValue(curTarget[r], targetVarName, t);
t++;
}
}
private void UpdateSelectedValue(string variableValue)
{
sharedFixedVariables.SetVariableValue(variableValue, FreeVariable, 0);
OnVariableValueChanged(this, EventArgs.Empty);
}
private void SampleTrainingData(MersenneTwister rand, ModifiableDataset ds, int rRows,
IDataset sourceDs, double[] curTarget, string targetVarName, IEnumerable<int> trainingIndices) {
var selectedRows = trainingIndices.SampleRandomWithoutRepetition(rand, rRows).ToArray();
int t = 0;
object[] srcRow = new object[ds.Columns];
var varNames = ds.DoubleVariables.ToArray();
foreach (var r in selectedRows) {
// take all values from the original dataset
for (int c = 0; c < srcRow.Length; c++) {
var col = sourceDs.GetReadOnlyDoubleValues(varNames[c]);
srcRow[c] = col[r];
}
ds.ReplaceRow(t, srcRow);
// but use the updated target values
ds.SetVariableValue(curTarget[r], targetVarName, t);
t++;
}
}