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<title>GNU Scientific Library &ndash; Reference Manual: Vector operations</title>

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<a name="Vector-operations"></a>
<div class="header">
<p>
Next: <a href="Finding-maximum-and-minimum-elements-of-vectors.html#Finding-maximum-and-minimum-elements-of-vectors" accesskey="n" rel="next">Finding maximum and minimum elements of vectors</a>, Previous: <a href="Exchanging-elements.html#Exchanging-elements" accesskey="p" rel="previous">Exchanging elements</a>, Up: <a href="Vectors.html#Vectors" accesskey="u" rel="up">Vectors</a> &nbsp; [<a href="Function-Index.html#Function-Index" title="Index" rel="index">Index</a>]</p>
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<hr>
<a name="Vector-operations-1"></a>
<h4 class="subsection">8.3.8 Vector operations</h4>

<dl>
<dt><a name="index-gsl_005fvector_005fadd"></a>Function: <em>int</em> <strong>gsl_vector_add</strong> <em>(gsl_vector * <var>a</var>, const gsl_vector * <var>b</var>)</em></dt>
<dd><p>This function adds the elements of vector <var>b</var> to the elements of
vector <var>a</var>.  The result <em>a_i \leftarrow a_i + b_i</em> is stored
in <var>a</var> and <var>b</var> remains unchanged.  The two vectors must have
the same length.
</p></dd></dl>

<dl>
<dt><a name="index-gsl_005fvector_005fsub"></a>Function: <em>int</em> <strong>gsl_vector_sub</strong> <em>(gsl_vector * <var>a</var>, const gsl_vector * <var>b</var>)</em></dt>
<dd><p>This function subtracts the elements of vector <var>b</var> from the elements of
vector <var>a</var>.  The result <em>a_i \leftarrow a_i - b_i</em> is stored
in <var>a</var> and <var>b</var> remains unchanged.  The two vectors must have the
same length.
</p></dd></dl>

<dl>
<dt><a name="index-gsl_005fvector_005fmul"></a>Function: <em>int</em> <strong>gsl_vector_mul</strong> <em>(gsl_vector * <var>a</var>, const gsl_vector * <var>b</var>)</em></dt>
<dd><p>This function multiplies the elements of vector <var>a</var> by the
elements of vector <var>b</var>.  The result <em>a_i \leftarrow a_i *
b_i</em> is stored in <var>a</var> and <var>b</var> remains unchanged. The two
vectors must have the same length.
</p></dd></dl>

<dl>
<dt><a name="index-gsl_005fvector_005fdiv"></a>Function: <em>int</em> <strong>gsl_vector_div</strong> <em>(gsl_vector * <var>a</var>, const gsl_vector * <var>b</var>)</em></dt>
<dd><p>This function divides the elements of vector <var>a</var> by the elements
of vector <var>b</var>.  The result <em>a_i \leftarrow a_i / b_i</em> is
stored in <var>a</var> and <var>b</var> remains unchanged. The two vectors must
have the same length.
</p></dd></dl>

<dl>
<dt><a name="index-gsl_005fvector_005fscale"></a>Function: <em>int</em> <strong>gsl_vector_scale</strong> <em>(gsl_vector * <var>a</var>, const double <var>x</var>)</em></dt>
<dd><p>This function multiplies the elements of vector <var>a</var> by the
constant factor <var>x</var>.  The result <em>a_i \leftarrow x a_i</em> is
stored in <var>a</var>.
</p></dd></dl>

<dl>
<dt><a name="index-gsl_005fvector_005fadd_005fconstant"></a>Function: <em>int</em> <strong>gsl_vector_add_constant</strong> <em>(gsl_vector * <var>a</var>, const double <var>x</var>)</em></dt>
<dd><p>This function adds the constant value <var>x</var> to the elements of the
vector <var>a</var>.  The result <em>a_i \leftarrow a_i + x</em> is stored in
<var>a</var>.
</p></dd></dl>




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