Updated Version
Evidente allows users to aggregate by their node depth (the distance of the node to the root node). This method can be accessed by clicking on the root node and selecting the option to 'Collapse nodes by their depth'. This will open a pop-up window with a slider to select the depth. Pressing the button 'Select Nodes' will select the nodes of the chosen depth and highlight them. Pressing the button 'Save Changes' will aggregate the selected nodes.
To aggregate nodes by their SNP content, users can click the button 'Choose a threshold' provided in the menu 'Filter nodes by SNP content'. A pop-up window will open which allows users to select a value with a slider. Pressing the button 'Select Nodes' will select the nodes of the chosen depth and highlight them. Pressing the button 'Save Changes' will aggregate the selected nodes.
Evidente also allows the user to automatize the hiding or aggregation of some clades by using metadata. For this automatic filtering, the user needs to create one or many "Filter Groups" in the corresponding menu of Evidente. A filter group defines a characteristic that a certain leaf needs to fulfil in order to be shown. When creating a filter group, the node needs to fulfil any of the given criteria (OR-junction of the rules). When many filter groups are created, a leaf needs to fulfil all criteria to be shown (AND-junction). By applying the filter groups, Evidente will prove which nodes fulfil the criteria and show them. If no node will be shown, the "Apply filter groups" function is disabled. Applying the filter will open a pop-up window where the user can chose to hide nodes or collapse them. Choosing the option to collapse the nodes will aggregate the direct parent node of the leaves that do not fulfil the criteria to be shown.
Multiple leaves can be aggregated by selecting them with a selection rectangle. To create the selection rectangle users need to press the ctrl-key and drag the mouse over the labels which should be aggregated. Evidente will automatically find their lowest common ancestor and aggregate it.
By moving the mouse over a node and simultaneously pressing the shift-key and scrolling nodes can be aggregated or expanded.
As an interactive visual analytics tool, Evidente allows the user to zoom in (via a scroll interaction) and pan (via dragging) the visualizations. The vertical axis is synchronized across all components to maintain the alignment. The horizontal zooming (ctrl + scrolling) and panning (ctrl + panning) is independent for each component.
