algvector.html

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public <B>AlgVector</B>(<A HREF="../../weka/core/Instance.html" title="class in weka.core">Instance</A>&nbsp;instance)
          throws java.lang.Exception</PRE>
<DL>
<DD>Constructs a vector using an instance.
 The vector has an element for each numerical attribute.
 The other attributes (nominal, string) are ignored.
<P>
<DL>
<DT><B>Parameters:</B><DD><CODE>instance</CODE> - with numeric attributes, that AlgVector gets build from
<DT><B>Throws:</B>
<DD><CODE>java.lang.Exception</CODE> - if instance doesn't have access to the data format</DL>
</DL>

<!-- ============ METHOD DETAIL ========== -->

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<B>Method Detail</B></FONT></TH>
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</TABLE>

<A NAME="clone()"><!-- --></A><H3>
clone</H3>
<PRE>
public java.lang.Object <B>clone</B>()
                       throws java.lang.CloneNotSupportedException</PRE>
<DL>
<DD>Creates and returns a clone of this object.
<P>
<DD><DL>
<DT><B>Overrides:</B><DD><CODE>clone</CODE> in class <CODE>java.lang.Object</CODE></DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>a clone of this instance.
<DT><B>Throws:</B>
<DD><CODE>java.lang.CloneNotSupportedException</CODE> - if an error occurs</DL>
</DD>
</DL>
<HR>

<A NAME="getElement(int)"><!-- --></A><H3>
getElement</H3>
<PRE>
public final double <B>getElement</B>(int&nbsp;index)</PRE>
<DL>
<DD>Returns the value of a cell in the matrix.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>index</CODE> - the row's index
<DT><B>Returns:</B><DD>the value of the cell of the vector</DL>
</DD>
</DL>
<HR>

<A NAME="numElements()"><!-- --></A><H3>
numElements</H3>
<PRE>
public final int <B>numElements</B>()</PRE>
<DL>
<DD>Returns the number of elements in the vector.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>the number of rows</DL>
</DD>
</DL>
<HR>

<A NAME="setElement(int, double)"><!-- --></A><H3>
setElement</H3>
<PRE>
public final void <B>setElement</B>(int&nbsp;index,
                             double&nbsp;value)</PRE>
<DL>
<DD>Sets an element of the matrix to the given value.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>index</CODE> - the elements index<DD><CODE>value</CODE> - the new value</DL>
</DD>
</DL>
<HR>

<A NAME="setElements(double[])"><!-- --></A><H3>
setElements</H3>
<PRE>
public final void <B>setElements</B>(double[]&nbsp;elements)</PRE>
<DL>
<DD>Sets the elements of the vector to values of the given array.
 Performs a deep copy.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>elements</CODE> - an array of doubles</DL>
</DD>
</DL>
<HR>

<A NAME="getElements(int)"><!-- --></A><H3>
getElements</H3>
<PRE>
public double[] <B>getElements</B>(int&nbsp;index)</PRE>
<DL>
<DD>Gets the elements of the vector and returns them as double array.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>an array of doubles</DL>
</DD>
</DL>
<HR>

<A NAME="getAsInstance(weka.core.Instances, java.util.Random)"><!-- --></A><H3>
getAsInstance</H3>
<PRE>
public <A HREF="../../weka/core/Instance.html" title="class in weka.core">Instance</A> <B>getAsInstance</B>(<A HREF="../../weka/core/Instances.html" title="class in weka.core">Instances</A>&nbsp;model,
                              java.util.Random&nbsp;random)
                       throws java.lang.Exception</PRE>
<DL>
<DD>Gets the elements of the vector as an instance.

 !! NON-numeric data is ignored sofar
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>an array of doubles
<DT><B>Throws:</B>
<DD><CODE>java.lang.Exception</CODE> - if length of vector is not number of numerical attributes</DL>
</DD>
</DL>
<HR>

<A NAME="toString()"><!-- --></A><H3>
toString</H3>
<PRE>
public java.lang.String <B>toString</B>()</PRE>
<DL>
<DD>Converts a vector to a string
<P>
<DD><DL>
<DT><B>Overrides:</B><DD><CODE>toString</CODE> in class <CODE>java.lang.Object</CODE></DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>the converted string</DL>
</DD>
</DL>
<HR>

<A NAME="add(weka.core.AlgVector)"><!-- --></A><H3>
add</H3>
<PRE>
public final <A HREF="../../weka/core/AlgVector.html" title="class in weka.core">AlgVector</A> <B>add</B>(<A HREF="../../weka/core/AlgVector.html" title="class in weka.core">AlgVector</A>&nbsp;other)</PRE>
<DL>
<DD>Returns the sum of this vector with another.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>a vector containing the sum.</DL>
</DD>
</DL>
<HR>

<A NAME="substract(weka.core.AlgVector)"><!-- --></A><H3>
substract</H3>
<PRE>
public final <A HREF="../../weka/core/AlgVector.html" title="class in weka.core">AlgVector</A> <B>substract</B>(<A HREF="../../weka/core/AlgVector.html" title="class in weka.core">AlgVector</A>&nbsp;other)</PRE>
<DL>
<DD>Returns the difference of this vector minus another.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>a vector containing the difference vector.</DL>
</DD>
</DL>
<HR>

<A NAME="dotMultiply(weka.core.AlgVector)"><!-- --></A><H3>
dotMultiply</H3>
<PRE>
public final double <B>dotMultiply</B>(<A HREF="../../weka/core/AlgVector.html" title="class in weka.core">AlgVector</A>&nbsp;b)</PRE>
<DL>
<DD>Returns the inner (or dot) product of two vectors
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>b</CODE> - the multiplication matrix
<DT><B>Returns:</B><DD>the double representing the dot product</DL>
</DD>
</DL>
<HR>

<A NAME="scalarMultiply(double)"><!-- --></A><H3>
scalarMultiply</H3>
<PRE>
public final void <B>scalarMultiply</B>(double&nbsp;s)</PRE>
<DL>
<DD>Computes the scalar product of this vector with a scalar
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>s</CODE> - the scalar</DL>
</DD>
</DL>
<HR>

<A NAME="changeLength(double)"><!-- --></A><H3>
changeLength</H3>
<PRE>
public void <B>changeLength</B>(double&nbsp;len)</PRE>
<DL>
<DD>Changes the length of a vector.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>len</CODE> - the new length of the vector</DL>
</DD>
</DL>
<HR>

<A NAME="norm()"><!-- --></A><H3>
norm</H3>
<PRE>
public double <B>norm</B>()</PRE>
<DL>
<DD>Returns the norm of the vector
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>the norm of the vector</DL>
</DD>
</DL>
<HR>

<A NAME="normVector()"><!-- --></A><H3>
normVector</H3>
<PRE>
public final void <B>normVector</B>()</PRE>
<DL>
<DD>Norms this vector to length 1.0
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="main(java.lang.String[])"><!-- --></A><H3>
main</H3>
<PRE>
public static void <B>main</B>(java.lang.String[]&nbsp;ops)</PRE>
<DL>
<DD>Main method for testing this class.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
</DL>
</DD>
</DL>
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