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&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Return the width of the matrix.</TD>
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<A NAME="height"><!-- --></A><H3>
height</H3>
<PRE>
protected int <B>height</B></PRE>
<DL>
</DL>
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<A NAME="width"><!-- --></A><H3>
width</H3>
<PRE>
protected int <B>width</B></PRE>
<DL>
</DL>
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<A NAME="rows"><!-- --></A><H3>
rows</H3>
<PRE>
protected <A HREF="../structure/Vector.html">Vector</A> <B>rows</B></PRE>
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<A NAME="Matrix()"><!-- --></A><H3>
Matrix</H3>
<PRE>
public <B>Matrix</B>()</PRE>
<DL>
<DD>Construct an empty matrix.</DL>
<HR>

<A NAME="Matrix(int, int)"><!-- --></A><H3>
Matrix</H3>
<PRE>
public <B>Matrix</B>(int&nbsp;h,
              int&nbsp;w)</PRE>
<DL>
<DD>Constructs a matrix such that all values are null.<DD><DL>
<DT><B>Parameters:</B><DD><CODE>h</CODE> - Height of the matrix.<DD><CODE>w</CODE> - Width of the matrix.</DL>
</DD>
</DL>

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<A NAME="get(int, int)"><!-- --></A><H3>
get</H3>
<PRE>
public <A HREF="http://java.sun.com/j2se/1.3/docs/api/java/lang/Object.html">Object</A> <B>get</B>(int&nbsp;row,
                  int&nbsp;col)</PRE>
<DL>
<DD>Fetch an element from the matrix.<DD><DL>
<DT><B>Parameters:</B><DD><CODE>row</CODE> - The row of the element<DD><CODE>col</CODE> - The column of the element<DT><B>Precondition:</B><DD>0 <= row < height(), 0 <= col < width()<br><DT><B>Postcondition:</B><DD>returns object at (row, col)<br><DT><B>Returns:</B><DD>Object located at matrix position (row, col)</DL>
</DD>
</DL>
<HR>

<A NAME="set(int, int, java.lang.Object)"><!-- --></A><H3>
set</H3>
<PRE>
public void <B>set</B>(int&nbsp;row,
                int&nbsp;col,
                <A HREF="http://java.sun.com/j2se/1.3/docs/api/java/lang/Object.html">Object</A>&nbsp;value)</PRE>
<DL>
<DD>Change the value at location (row, col)<DD><DL>
<DT><B>Parameters:</B><DD><CODE>value</CODE> - The new Object reference (possibly null).<DD><CODE>row</CODE> - The row of the value to be changed.<DD><CODE>col</CODE> - The column of the value to be changed.<DT><B>Precondition:</B><DD>0 <= row < height(), 0 <= col < width()<br><DT><B>Postcondition:</B><DD>changes location (row, col) to value<br></DL>
</DD>
</DL>
<HR>

<A NAME="addRow(int)"><!-- --></A><H3>
addRow</H3>
<PRE>
public void <B>addRow</B>(int&nbsp;r)</PRE>
<DL>
<DD>Add a new row, whose index will be r.<DD><DL>
<DT><B>Parameters:</B><DD><CODE>r</CODE> - The index of the  newly inserted row.<DT><B>Precondition:</B><DD>0 <= r < height()<br><DT><B>Postcondition:</B><DD>inserts row of null values to be row r<br></DL>
</DD>
</DL>
<HR>

<A NAME="addCol(int)"><!-- --></A><H3>
addCol</H3>
<PRE>
public void <B>addCol</B>(int&nbsp;c)</PRE>
<DL>
<DD>Add a new column, whose index will be c.<DD><DL>
<DT><B>Parameters:</B><DD><CODE>c</CODE> - The index of the newly inserted column.<DT><B>Precondition:</B><DD>0 <= c < width()<br><DT><B>Postcondition:</B><DD>inserts column of null values to be column c<br></DL>
</DD>
</DL>
<HR>

<A NAME="removeRow(int)"><!-- --></A><H3>
removeRow</H3>
<PRE>
public <A HREF="../structure/Vector.html">Vector</A> <B>removeRow</B>(int&nbsp;r)</PRE>
<DL>
<DD>Remove the row whose index is r.
 The row is returned as a vector.<DD><DL>
<DT><B>Parameters:</B><DD><CODE>r</CODE> - The index of the to-be-removed row.<DT><B>Precondition:</B><DD>0 <= r < height()<br><DT><B>Postcondition:</B><DD>removes row r and returns it as a Vector<DT><B>Returns:</B><DD>A vector of values once in the row.</DL>
</DD>
</DL>
<HR>

<A NAME="removeCol(int)"><!-- --></A><H3>
removeCol</H3>
<PRE>
public <A HREF="../structure/Vector.html">Vector</A> <B>removeCol</B>(int&nbsp;c)</PRE>
<DL>
<DD>Remove a column, whose index is c.<DD><DL>
<DT><B>Parameters:</B><DD><CODE>c</CODE> - The index of the column to be removed.<DT><B>Precondition:</B><DD>0 <= c < width<br><DT><B>Postcondition:</B><DD>removes column c and returns it as a vector<br><DT><B>Returns:</B><DD>A vector of the values removed.</DL>
</DD>
</DL>
<HR>

<A NAME="width()"><!-- --></A><H3>
width</H3>
<PRE>
public int <B>width</B>()</PRE>
<DL>
<DD>Return the width of the matrix.<DD><DL>
<DT><B>Postcondition:</B><DD>returns number of columns in matrix<br><DT><B>Returns:</B><DD>The number of columns in the matrix.</DL>
</DD>
</DL>
<HR>

<A NAME="height()"><!-- --></A><H3>
height</H3>
<PRE>
public int <B>height</B>()</PRE>
<DL>
<DD>Return the height of the matrix.<DD><DL>
<DT><B>Postcondition:</B><DD>returns number of rows in matrix<br><DT><B>Returns:</B><DD>The number of rows in the matrix.</DL>
</DD>
</DL>
<HR>

<A NAME="toString()"><!-- --></A><H3>
toString</H3>
<PRE>
public <A HREF="http://java.sun.com/j2se/1.3/docs/api/java/lang/String.html">String</A> <B>toString</B>()</PRE>
<DL>
<DD>Construct a string representation of the matrix.<DD><DL>
<DT><B>Overrides:</B><DD><CODE><A HREF="http://java.sun.com/j2se/1.3/docs/api/java/lang/Object.html#toString()">toString</A></CODE> in class <CODE><A HREF="http://java.sun.com/j2se/1.3/docs/api/java/lang/Object.html">Object</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Postcondition:</B><DD>returns string description of matrix.<br><DT><B>Returns:</B><DD>A string, representing the matrix.</DL>
</DD>
</DL>
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