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<H1>insertion sort</H1>
<P>
(algorithm)

<P>
<strong>Definition:</strong>
An algorithm which orders items by repeatedly taking the next item and inserting it into the final data structure in its proper order with respect to items already inserted.  Run time is <a href="bigOnotation.html" tppabs="http://hissa.nist.gov/dads/HTML/bigOnotation.html"><em>O(n<sup>2</sup>)</em></a>.
<P><em>Note:
Sorting can be done <a href="inplacesort.html" tppabs="http://hissa.nist.gov/dads/HTML/inplacesort.html"><em>in place</em></a> by taking the next item past the end of the sorted items, finding where the item should be inserted, opening a space there by moving following items forward (into the opening at the end where the item was removed), then putting the item in the open space.  Use <a href="binarysrch.html" tppabs="http://hissa.nist.gov/dads/HTML/binarysrch.html"><em>binary search</em></a> to reduce the number of comparisons needed to find where the item should be inserted.</em>
<P>Author: <a href="terms.html#authorPEB" tppabs="http://hissa.nist.gov/dads/terms.html#authorPEB">PEB</a>
<H2>Implementation</H2>
<A HREF="javascript:if(confirm('http://www.nist.gov/cgi-bin/exit_nist.cgi?url=http://www.cs.ubc.ca/spider/harrison/Java/InsertionSortAlgorithm.java  \n\nThis file was not retrieved by Teleport Pro, because it is addressed on a domain or path outside the boundaries set for its Starting Address.  \n\nDo you want to open it from the server?'))window.location='http://www.nist.gov/cgi-bin/exit_nist.cgi?url=http://www.cs.ubc.ca/spider/harrison/Java/InsertionSortAlgorithm.java'" tppabs="http://www.nist.gov/cgi-bin/exit_nist.cgi?url=http://www.cs.ubc.ca/spider/harrison/Java/InsertionSortAlgorithm.java">(Java)</A>.
<H2>More information</H2>
<A HREF="javascript:if(confirm('http://www.nist.gov/cgi-bin/exit_nist.cgi?url=http://www.cs.ubc.ca/spider/harrison/Java/sorting-demo.html  \n\nThis file was not retrieved by Teleport Pro, because it is addressed on a domain or path outside the boundaries set for its Starting Address.  \n\nDo you want to open it from the server?'))window.location='http://www.nist.gov/cgi-bin/exit_nist.cgi?url=http://www.cs.ubc.ca/spider/harrison/Java/sorting-demo.html'" tppabs="http://www.nist.gov/cgi-bin/exit_nist.cgi?url=http://www.cs.ubc.ca/spider/harrison/Java/sorting-demo.html">demonstration</A>.

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Entry modified Thu Jan 20 16:35:51 2000.<BR>
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