subtree_at

Extracts a sub-tree rooted at a particular node.

A customisable set of tools for assessing and grading
R or R-markdown scripts from students. It allows for checking correctness
of code output, runtime statistics and static code analysis. The latter
feature is made possible by representing R expressions using a tree
structure.

Agrawal Naman

autoharp

Semi-Automatic Grading of R and Rmd Scripts

Vik Gopal

Samuel Seah

Viknesh Jeya Kumar

Gabriel Ang

Ruofan Liu

National University of Singapore 

subtree_at function

<dl><dt>obj</dt>
<dd>An object of class TreeHarp</dd>
<dt>at_node</dt>
<dd>The root of the new sub-tree. An integer, not a label, that
corresponds to BFS indexing of the tree.</dd>
<dt>preserve_call</dt>
<dd>A logical value that indicates if a sub-call should be 
extracted. This might be slower, but it allows you to evaluate it later.</dd></dl>

Arguments

Extract a sub-tree. — subtree_at

<dl>

<dt>obj</dt>
<dd>An object of class TreeHarp</dd>


<dt>at_node</dt>
<dd>The root of the new sub-tree. An integer, not a label, that
corresponds to BFS indexing of the tree.</dd>


<dt>preserve_call</dt>
<dd>A logical value that indicates if a sub-call should be 
extracted. This might be slower, but it allows you to evaluate it later.</dd>

</dl>

subtree_at: Extract a sub-tree.

Description

Usage

Value

Arguments

Details

Examples