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| <a href="#func-members">Functions</a> </div> |
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| <h1>Mean<br/> |
| <small> |
| [<a class="el" href="group__group_stats.html">Statistics Functions</a>]</small> |
| </h1> </div> |
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| <table class="memberdecls"> |
| <tr><td colspan="2"><h2><a name="func-members"></a> |
| Functions</h2></td></tr> |
| <tr><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="group__mean.html#ga74ce08c49ab61e57bd50c3a0ca1fdb2b">arm_mean_f32</a> (<a class="el" href="arm__math_8h.html#a4611b605e45ab401f02cab15c5e38715">float32_t</a> *pSrc, uint32_t <a class="el" href="arm__variance__example__f32_8c.html#ab6558f40a619c2502fbc24c880fd4fb0">blockSize</a>, <a class="el" href="arm__math_8h.html#a4611b605e45ab401f02cab15c5e38715">float32_t</a> *pResult)</td></tr> |
| <tr><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="group__mean.html#gacf2526d8c2d75e486e8f0b0e31877ad0">arm_mean_q31</a> (<a class="el" href="arm__math_8h.html#adc89a3547f5324b7b3b95adec3806bc0">q31_t</a> *pSrc, uint32_t <a class="el" href="arm__variance__example__f32_8c.html#ab6558f40a619c2502fbc24c880fd4fb0">blockSize</a>, <a class="el" href="arm__math_8h.html#adc89a3547f5324b7b3b95adec3806bc0">q31_t</a> *pResult)</td></tr> |
| <tr><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="group__mean.html#gac882495d5f098819fd3939c1ef7795b3">arm_mean_q15</a> (<a class="el" href="arm__math_8h.html#ab5a8fb21a5b3b983d5f54f31614052ea">q15_t</a> *pSrc, uint32_t <a class="el" href="arm__variance__example__f32_8c.html#ab6558f40a619c2502fbc24c880fd4fb0">blockSize</a>, <a class="el" href="arm__math_8h.html#ab5a8fb21a5b3b983d5f54f31614052ea">q15_t</a> *pResult)</td></tr> |
| <tr><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="group__mean.html#gaebc707ee539020357c25da4c75b52eb7">arm_mean_q7</a> (<a class="el" href="arm__math_8h.html#ae541b6f232c305361e9b416fc9eed263">q7_t</a> *pSrc, uint32_t <a class="el" href="arm__variance__example__f32_8c.html#ab6558f40a619c2502fbc24c880fd4fb0">blockSize</a>, <a class="el" href="arm__math_8h.html#ae541b6f232c305361e9b416fc9eed263">q7_t</a> *pResult)</td></tr> |
| </table> |
| <hr/><a name="_details"></a><h2>Detailed Description</h2> |
| <p>Calculates the mean of the input vector. Mean is defined as the average of the elements in the vector. The underlying algorithm is used:</p> |
| <pre> |
| Result = (pSrc[0] + pSrc[1] + pSrc[2] + ... + pSrc[blockSize-1]) / blockSize; |
| </pre><p>There are separate functions for floating-point, Q31, Q15, and Q7 data types. </p> |
| <hr/><h2>Function Documentation</h2> |
| <a class="anchor" id="ga74ce08c49ab61e57bd50c3a0ca1fdb2b"></a><!-- doxytag: member="arm_mean_f32.c::arm_mean_f32" ref="ga74ce08c49ab61e57bd50c3a0ca1fdb2b" args="(float32_t *pSrc, uint32_t blockSize, float32_t *pResult)" --> |
| <div class="memitem"> |
| <div class="memproto"> |
| <table class="memname"> |
| <tr> |
| <td class="memname">void arm_mean_f32 </td> |
| <td>(</td> |
| <td class="paramtype"><a class="el" href="arm__math_8h.html#a4611b605e45ab401f02cab15c5e38715">float32_t</a> * </td> |
| <td class="paramname"> <em>pSrc</em>, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype">uint32_t </td> |
| <td class="paramname"> <em>blockSize</em>, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype"><a class="el" href="arm__math_8h.html#a4611b605e45ab401f02cab15c5e38715">float32_t</a> * </td> |
| <td class="paramname"> <em>pResult</em> </td> |
| </tr> |
| <tr> |
| <td></td> |
| <td>)</td> |
| <td></td><td></td> |
| </tr> |
| </table> |
| </div> |
| <div class="memdoc"> |
| |
| <p>Mean value of a floating-point vector. </p> |
| <dl><dt><b>Parameters:</b></dt><dd> |
| <table class="params"> |
| <tr><td class="paramdir">[in]</td><td class="paramname">*pSrc</td><td>points to the input vector </td></tr> |
| <tr><td class="paramdir">[in]</td><td class="paramname">blockSize</td><td>length of the input vector </td></tr> |
| <tr><td class="paramdir">[out]</td><td class="paramname">*pResult</td><td>mean value returned here </td></tr> |
| </table> |
| </dd> |
| </dl> |
| <dl class="return"><dt><b>Returns:</b></dt><dd>none. </dd></dl> |
| <dl><dt><b>Examples: </b></dt><dd><a class="el" href="arm_class_marks_example_f32_8c-example.html#a20">arm_class_marks_example_f32.c</a>.</dd> |
| </dl> |
| <p>Definition at line <a class="el" href="arm__mean__f32_8c_source.html#l00064">64</a> of file <a class="el" href="arm__mean__f32_8c_source.html">arm_mean_f32.c</a>.</p> |
| |
| </div> |
| </div> |
| <a class="anchor" id="gacf2526d8c2d75e486e8f0b0e31877ad0"></a><!-- doxytag: member="arm_mean_q31.c::arm_mean_q31" ref="gacf2526d8c2d75e486e8f0b0e31877ad0" args="(q31_t *pSrc, uint32_t blockSize, q31_t *pResult)" --> |
| <div class="memitem"> |
| <div class="memproto"> |
| <table class="memname"> |
| <tr> |
| <td class="memname">void arm_mean_q31 </td> |
| <td>(</td> |
| <td class="paramtype"><a class="el" href="arm__math_8h.html#adc89a3547f5324b7b3b95adec3806bc0">q31_t</a> * </td> |
| <td class="paramname"> <em>pSrc</em>, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype">uint32_t </td> |
| <td class="paramname"> <em>blockSize</em>, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype"><a class="el" href="arm__math_8h.html#adc89a3547f5324b7b3b95adec3806bc0">q31_t</a> * </td> |
| <td class="paramname"> <em>pResult</em> </td> |
| </tr> |
| <tr> |
| <td></td> |
| <td>)</td> |
| <td></td><td></td> |
| </tr> |
| </table> |
| </div> |
| <div class="memdoc"> |
| |
| <p>Mean value of a Q31 vector. </p> |
| <dl><dt><b>Parameters:</b></dt><dd> |
| <table class="params"> |
| <tr><td class="paramdir">[in]</td><td class="paramname">*pSrc</td><td>points to the input vector </td></tr> |
| <tr><td class="paramdir">[in]</td><td class="paramname">blockSize</td><td>length of the input vector </td></tr> |
| <tr><td class="paramdir">[out]</td><td class="paramname">*pResult</td><td>mean value returned here </td></tr> |
| </table> |
| </dd> |
| </dl> |
| <dl class="return"><dt><b>Returns:</b></dt><dd>none.</dd></dl> |
| <p><b>Scaling and Overflow Behavior:</b> </p> |
| <dl class="user"><dt><b></b></dt><dd>The function is implemented using a 64-bit internal accumulator. The input is represented in 1.31 format and is accumulated in a 64-bit accumulator in 33.31 format. There is no risk of internal overflow with this approach, and the full precision of intermediate result is preserved. Finally, the accumulator is truncated to yield a result of 1.31 format. </dd></dl> |
| |
| <p>Definition at line <a class="el" href="arm__mean__q31_8c_source.html#l00061">61</a> of file <a class="el" href="arm__mean__q31_8c_source.html">arm_mean_q31.c</a>.</p> |
| |
| </div> |
| </div> |
| <a class="anchor" id="gac882495d5f098819fd3939c1ef7795b3"></a><!-- doxytag: member="arm_mean_q15.c::arm_mean_q15" ref="gac882495d5f098819fd3939c1ef7795b3" args="(q15_t *pSrc, uint32_t blockSize, q15_t *pResult)" --> |
| <div class="memitem"> |
| <div class="memproto"> |
| <table class="memname"> |
| <tr> |
| <td class="memname">void arm_mean_q15 </td> |
| <td>(</td> |
| <td class="paramtype"><a class="el" href="arm__math_8h.html#ab5a8fb21a5b3b983d5f54f31614052ea">q15_t</a> * </td> |
| <td class="paramname"> <em>pSrc</em>, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype">uint32_t </td> |
| <td class="paramname"> <em>blockSize</em>, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype"><a class="el" href="arm__math_8h.html#ab5a8fb21a5b3b983d5f54f31614052ea">q15_t</a> * </td> |
| <td class="paramname"> <em>pResult</em> </td> |
| </tr> |
| <tr> |
| <td></td> |
| <td>)</td> |
| <td></td><td></td> |
| </tr> |
| </table> |
| </div> |
| <div class="memdoc"> |
| |
| <p>Mean value of a Q15 vector. </p> |
| <dl><dt><b>Parameters:</b></dt><dd> |
| <table class="params"> |
| <tr><td class="paramdir">[in]</td><td class="paramname">*pSrc</td><td>points to the input vector </td></tr> |
| <tr><td class="paramdir">[in]</td><td class="paramname">blockSize</td><td>length of the input vector </td></tr> |
| <tr><td class="paramdir">[out]</td><td class="paramname">*pResult</td><td>mean value returned here </td></tr> |
| </table> |
| </dd> |
| </dl> |
| <dl class="return"><dt><b>Returns:</b></dt><dd>none.</dd></dl> |
| <p><b>Scaling and Overflow Behavior:</b> </p> |
| <dl class="user"><dt><b></b></dt><dd>The function is implemented using a 32-bit internal accumulator. The input is represented in 1.15 format and is accumulated in a 32-bit accumulator in 17.15 format. There is no risk of internal overflow with this approach, and the full precision of intermediate result is preserved. Finally, the accumulator is saturated and truncated to yield a result of 1.15 format. </dd></dl> |
| |
| <p>Definition at line <a class="el" href="arm__mean__q15_8c_source.html#l00061">61</a> of file <a class="el" href="arm__mean__q15_8c_source.html">arm_mean_q15.c</a>.</p> |
| |
| </div> |
| </div> |
| <a class="anchor" id="gaebc707ee539020357c25da4c75b52eb7"></a><!-- doxytag: member="arm_mean_q7.c::arm_mean_q7" ref="gaebc707ee539020357c25da4c75b52eb7" args="(q7_t *pSrc, uint32_t blockSize, q7_t *pResult)" --> |
| <div class="memitem"> |
| <div class="memproto"> |
| <table class="memname"> |
| <tr> |
| <td class="memname">void arm_mean_q7 </td> |
| <td>(</td> |
| <td class="paramtype"><a class="el" href="arm__math_8h.html#ae541b6f232c305361e9b416fc9eed263">q7_t</a> * </td> |
| <td class="paramname"> <em>pSrc</em>, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype">uint32_t </td> |
| <td class="paramname"> <em>blockSize</em>, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype"><a class="el" href="arm__math_8h.html#ae541b6f232c305361e9b416fc9eed263">q7_t</a> * </td> |
| <td class="paramname"> <em>pResult</em> </td> |
| </tr> |
| <tr> |
| <td></td> |
| <td>)</td> |
| <td></td><td></td> |
| </tr> |
| </table> |
| </div> |
| <div class="memdoc"> |
| |
| <p>Mean value of a Q7 vector. </p> |
| <dl><dt><b>Parameters:</b></dt><dd> |
| <table class="params"> |
| <tr><td class="paramdir">[in]</td><td class="paramname">*pSrc</td><td>points to the input vector </td></tr> |
| <tr><td class="paramdir">[in]</td><td class="paramname">blockSize</td><td>length of the input vector </td></tr> |
| <tr><td class="paramdir">[out]</td><td class="paramname">*pResult</td><td>mean value returned here </td></tr> |
| </table> |
| </dd> |
| </dl> |
| <dl class="return"><dt><b>Returns:</b></dt><dd>none.</dd></dl> |
| <p><b>Scaling and Overflow Behavior:</b> </p> |
| <dl class="user"><dt><b></b></dt><dd>The function is implemented using a 32-bit internal accumulator. The input is represented in 1.7 format and is accumulated in a 32-bit accumulator in 25.7 format. There is no risk of internal overflow with this approach, and the full precision of intermediate result is preserved. Finally, the accumulator is truncated to yield a result of 1.7 format. </dd></dl> |
| |
| <p>Definition at line <a class="el" href="arm__mean__q7_8c_source.html#l00061">61</a> of file <a class="el" href="arm__mean__q7_8c_source.html">arm_mean_q7.c</a>.</p> |
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