Add support for Hours/Minutes/Seconds steps. Also, add a DayNumber option.

Setting the Expanded property of the GroupsExpandBehavior assigned to the RowGroupsExpandBehavior property of RadPivotGrid to True, and the RowSubTotalsPosition to None, leads to an error. 

To work this around set the RowSubTotalsPosition to Top. 

Or set the IsExpanded property of the corresponding PivotGroupHeader controls manually.

public MainWindow()
{
InitializeComponent();

// the Opacity is used to avoid the flicker that appears because the groups are rendered just before the collapse logic kicks-in.
this.pivotGrid.Opacity = 0;
this.pivotGrid.Loaded += PivotGrid_Loaded;            
}

private void PivotGrid_Loaded(object sender, RoutedEventArgs e)
{
Dispatcher.BeginInvoke(new Action(() => { 
var headers = this.pivotGrid.ChildrenOfType<PivotGroupHeader>();
foreach (var header in headers)
{
header.IsExpanded = false;
}
this.pivotGrid.Opacity = 1;
}), (DispatcherPriority)3);
}

Scheduled for:
The fix for this issue will be included in R1 2019, scheduled for the mid of January 2019. 

Currently it is only possible to either show all or hide all subtotals.

The DistinctValuesLimit property is available in our R1 2018 Release.

Available in the 2017 R1 Release (2017.1.117).

Implement functionality to show a break down of items that aggreagate to current cell.

Available in the 2017 R1 Release (2017.1.117).
For more reference you can check the following help article: http://docs.telerik.com/devtools/wpf/controls/radpivotgrid/features/localdatasourceprovider/drilldown

Applying "% Difference From" total format to a calculated description formats the calculated data in RadPivotGrid as double, instead of as a percent.

Available with the R3 2016 SP1 release.

Users should be able to select individual or multiple cells of RadPivotGrid.

Available in the 2016 R3 Release.
Please take a look at our help article for more information: 
http://docs.telerik.com/devtools/wpf/controls/radpivotgrid/features/selection

Available in LIB version 2016.2.606, it will be also available in the 2016 R2 SP1 release.

Available in LIB version 2015.2.914, it will be also available in the 2015 Q3.

In OLAP you are able to define ragged hierarchies. In a ragged hierarchy, the logical parent member of at least one member is not in the level immediately above the member. This can cause branches of the hierarchy to descend to different levels. RadPivotGrid doesn't show them correctly.

I would like RadPivotGrid to sort the dates defined in OLAP Cube as dates, for example:
-Week 1 -Week 2 -Week 12   Instead of the current sorting: -Week 1 -Week 12 -Week 2