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<title>CMSIS-DSP: Linear Interpolate Example</title>
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<div class="title">Linear Interpolate Example<div class="ingroups"><a class="el" href="group__groupExamples.html">Examples</a></div></div> </div>
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<p><b> CMSIS DSP Software Library – Linear Interpolate Example </b></p>
<p><b> Description </b> This example demonstrates usage of linear interpolate modules and fast math modules. Method 1 uses fast math sine function to calculate sine values using cubic interpolation and method 2 uses linear interpolation function and results are compared to reference output. Example shows linear interpolation function can be used to get higher precision compared to fast math sin calculation.</p>
<dl class="section user"><dt>Block Diagram:</dt><dd></dd></dl>
<dl class="section user"><dt></dt><dd><div class="image">
<img src="linearInterpExampleMethod1.gif" alt="linearInterpExampleMethod1.gif"/>
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Method 1: Sine caluclation using fast math</div></div>
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Method 2: Sine caluclation using interpolation function</div></div>
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<dl class="section user"><dt>Variables Description:</dt><dd></dd></dl>
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<li><code>testInputSin_f32</code> points to the input values for sine calculation </li>
<li><code>testRefSinOutput32_f32</code> points to the reference values caculated from sin() matlab function </li>
<li><code>testOutput</code> points to output buffer calculation from cubic interpolation </li>
<li><code>testLinIntOutput</code> points to output buffer calculation from linear interpolation </li>
<li><code>snr1</code> Signal to noise ratio for reference and cubic interpolation output </li>
<li><code>snr2</code> Signal to noise ratio for reference and linear interpolation output</li>
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<li><a class="el" href="group__sin.html#gae164899c4a3fc0e946dc5d55555fe541" title="Fast approximation to the trigonometric sine function for floating-point data. ">arm_sin_f32()</a></li>
<li><a class="el" href="group__LinearInterpolate.html#ga5335f60532bab8cee1e7c22f76a41805" title="Process function for the floating-point Linear Interpolation Function. ">arm_linear_interp_f32()</a></li>
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<p><b> Refer </b> <a class="el" href="arm_linear_interp_example_f32_8c-example.html">arm_linear_interp_example_f32.c</a> </p>
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