public void SelectOnMultipleIndexes()
{
// more complex example (isn't it another test?)
var array = new MultiDimensionalArray(3, 3);
// 1 9 2 1 2
// 9 9 9 ==>
// 3 9 4 3 4
array[0, 0] = 1;
array[0, 1] = 9;
array[0, 2] = 2;
array[1, 0] = 9;
array[1, 1] = 9;
array[1, 2] = 9;
array[2, 0] = 3;
array[2, 1] = 9;
array[2, 2] = 4;
IMultiDimensionalArrayView view = array.Select(0, new[] { 0, 2 }).Select(1, new[] { 0, 2 });
Assert.IsTrue(new[] { 2, 2 }.SequenceEqual(view.Shape));
Assert.AreEqual(4, view.Count);
Assert.AreEqual(1, view[0, 0]);
Assert.AreEqual(2, view[0, 1]);
Assert.AreEqual(3, view[1, 0]);
Assert.AreEqual(4, view[1, 1]);
}
public void SelectUsingIndexes()
{
IMultiDimensionalArray array = new MultiDimensionalArray(3);
array[0] = 1;
array[1] = 2;
array[2] = 3;
IMultiDimensionalArrayView view = array.Select(0, new[] { 0, 2 });
// Select first and last element
Assert.AreEqual(2, view.Count);
Assert.AreEqual(1, view[0]);
Assert.AreEqual(3, view[1]);
Assert.AreEqual(3, view.MaxValue);
Assert.AreEqual(1, view.MinValue);
}
public void Bind3DArrayUsing2DView()
{
IMultiDimensionalArray array = new MultiDimensionalArray(3, 3, 3);
array[0, 0, 0] = 1;
array[1, 1, 1] = 2;
IMultiDimensionalArrayView view = array.Select(0, 0, 0);
view.Reduce[0] = true; // reduce 1st dimension
DataGridView gridView = new DataGridView();
MultiDimensionalArrayBindingList multiDimensionalArrayBindingList = new MultiDimensionalArrayBindingList(view);
gridView.DataSource = multiDimensionalArrayBindingList;
Form form = new Form();
gridView.Dock = DockStyle.Fill;
form.Controls.Add(gridView);
WindowsFormsTestHelper.ShowModal(form);
}
/// <summary>
/// Prepares the Multidimensional array of function. Expands dimensions where needed.
/// TODO: this and above methods seem to be redundant
///
/// TODO: shouldn't it happen in Function?
/// </summary>
/// <param name="function"></param>
/// <param name="filters"></param>
/// <returns></returns>
private IMultiDimensionalArray CreateComponentArrayFromFilters(IFunction function,
IList <IVariableFilter> filters)
{
if (filters.Count == 0)
{
return(FunctionValues[Functions.IndexOf(function)]);
}
var variable = (IVariable)function;
// HACK: will create generic view. based on maxInt
IMultiDimensionalArrayView view = FunctionValues[Functions.IndexOf(variable)].Select(0, int.MinValue,
int.MaxValue);
// check if we have aggregation filters, if yes - return a new array, otherwise return a view based on existing array
// probably it should be always a view based on existing array, even when aggregation is used
if (filters.Any(f => f is VariableAggregationFilter))
{
var filterVariableIndex = new Dictionary <VariableAggregationFilter, int>();
foreach (VariableAggregationFilter filter in filters.OfType <VariableAggregationFilter>())
{
filterVariableIndex[filter] = variable.Arguments.IndexOf(filter.Variable);
}
// calculate shape of the resulting array
var shape = (int[])view.Shape.Clone();
foreach (VariableAggregationFilter filter in filters.OfType <VariableAggregationFilter>())
{
shape[filterVariableIndex[filter]] = filter.Count;
}
// now fill in values into the resulting array
IMultiDimensionalArray result = variable.CreateStorageArray();
result.Resize(shape);
int totalLength = MultiDimensionalArrayHelper.GetTotalLength(shape);
for (int i = 0; i < totalLength; i++)
{
int[] targetIndex = MultiDimensionalArrayHelper.GetIndex(i, result.Stride);
// calculate index in the source array
var sourceIndex = (int[])targetIndex.Clone();
foreach (VariableAggregationFilter filter in filters.OfType <VariableAggregationFilter>())
{
int filterArgumentIndex = filterVariableIndex[filter];
sourceIndex[filterArgumentIndex] = GetSourceIndex(filter, targetIndex[filterArgumentIndex]);
}
result[targetIndex] = view[sourceIndex]; // copy value (only required)
}
view = result.Select(0, int.MinValue, int.MaxValue);
}
//use variable filters that are relevant to make a selection
IEnumerable <IVariableFilter> relevantArgumentFilters =
filters.OfType <IVariableFilter>().Where(
f =>
(f is IVariableValueFilter || f is VariableIndexRangesFilter || f is VariableIndexRangeFilter) &&
(f.Variable == function || function.Arguments.Contains(f.Variable)));
foreach (IVariableFilter variableFilter in relevantArgumentFilters)
{
//determine indexes for this variable..get in a base class?
int[] indexes = GetArgumentIndexes(variableFilter);
if (function.IsIndependent && variableFilter.Variable == function)
{
view.SelectedIndexes[0] = indexes; // indepedent variable always dim 0
}
else if (function.Arguments.Contains(variableFilter.Variable))
{
int dimensionIndex = function.Arguments.IndexOf(variableFilter.Variable);
view.SelectedIndexes[dimensionIndex] = indexes;
}
}
//reduce the view for reduce filters.
foreach (VariableReduceFilter filter in filters.OfType <VariableReduceFilter>())
{
int index = function.Arguments.IndexOf(filter.Variable);
if (index != -1)
{
view.Reduce[index] = true;
}
}
return(view);
}
