Manipulate the Tree Elements

Think about an MS Word software or any document editor software that allows you to type but not to modify, delete, edit... etc. How would that be? Useless, right? Same is true for a decision tree software. You need to edit a tree in any way you want. You want to cut/copy/paste between nodes, copy a subtree and replace a node with that copied tree, insert decision/chance nodes between 2 connected nodes etc. Yes, everything is possible with this Decision Tree Maker and Analyzer software.

The Decision Tree Maker software supports the following manipulations on the decision tree.

  1. Vertical Position arrangement.
  2. Convert to Decision Node or Chance Node.
  3. Cut, Copy and Paste a Node.
  4. Replace a node with copied node/subtree.
  5. Delete a node or children.
  6. Insert a node.

Vertical position arrangement

Say, you have created a tree like this.

decision-tree-example

Now, you want to rearrange the vertical position of the options. Simply drag a node and move up or down.

drag-up

Once you leave the mouse, you will see the tree is rearranged.

tree-rearranged

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Convert to Decision Node or Chance Node

Select a Chance node, and right-click to open the context menu. You will notice the option "Convert to Decision Node".

context-menu-convert-node

If you select that menu, you will see the chance node is converted to a decision node.

converted-node

If you selected a decision node, then you could see the option "Convert to Chance Node". For example, select that converted Decision Node and right click to open the context menu, you will see the option "Convert to Chance Node".

convert-to-chance-node-menu

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Cut, Copy and Paste Node

You can select a node and from the context menu (or using keyboard CTRL+C) you can Copy a node. For example, notice the following tree.

tree-rearranged

We will select the Chance node and Copy from the context menu.

copy-node

Now, select the option node "Invest in the stock market" and paste.

paste-menu

Once pasted, the tree looks like this.

pasted-tree

Same like, Copy and Paste, you can cut a node or subtree and paste over another node.

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Replace a Node with copied node or subtree.

You can copy a node and replace a node with the copied node (along with its subtree). Consider the following tree.

sample-tree

Say, you want to replace the node B with the node A. Simply copy the node A and select node B, then from the context menu, choose 'Replace'.

replace-menu

Once replaced, the tree will look like this:

replaced-tree

You can even replace the root node using a copied node. For example, say you copied one of the decision nodes that have children "Buy a plane" and "Invest in business". Now select the root node and replace.

copy-a-node

Now, select the root node and open the context menu by right mouse click. Select "Replace".

replace-menu-root-node

Once the "Replace" menu is clicked, the tree becomes like this:

root-node-after-replacement

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Delete a node or Delete Children

From the context menu of any node, you can find the delete option. You can use the Delete Key of your keyboard to delete a selected node too. When you select a node and if that node has children, you can simply delete its children from a context menu option "Delete Children".

delete-children-menu

Once this option is chosen, the tree becomes:

children-deleted

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Insert a node

It won't be a fun if you could not insert a node between 2 nodes. Once you formed a decision tree and realized that, there was another decision needed to be taken before some action, or you just realized a new uncertainty between 2 sequential decisions, you need to insert a new decision node, or a chance node or a simultaneous node. Right? You can use the Insert feature from the context menu to solve this problem.

Say, you have a tree like this.

sample-journey-plan

Now, you realized that, when the car breaks down, there can be 2 uncertain scenarios, "Cell phone has network" and "No cell phone network". You can call a mechanic or dealership, only if your cell phone has the network signal, right? So, in order to insert a chance node after "Car breaks down", select the "Car breaks down" node and opens the context menu by mouse right click.

insert-context-menu

You can insert a node by selecting the decision node too, as shown below:

insert-before-context-menu

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Last updated on 2 October 2018, Tuesday, 7:31:37 PM
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