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|
| <h1 id="methods-chooser">Methods & Chooser</h1> |
| <p>Start with the four retained flagship paths. Move to wrappers only when the |
| data or comparison need points there.</p> |
| <div class="method-signature-banner"> |
| <span>Observed</span> |
| <span>Trend</span> |
| <span>Seasonal</span> |
| <span>Residual</span> |
| </div> |
|
|
| <h2 id="flagship-method-cards">Flagship method cards</h2> |
| <div class="method-use-grid"> |
| <div class="method-use-card"> |
| <h3><code>SSA</code></h3> |
| <p><strong>Use when:</strong> one series needs interpretable subspace components.</p> |
| <p><strong>Avoid when:</strong> the series is too short for a meaningful window.</p> |
| <p><strong>Key params:</strong> <code>window</code>, <code>rank</code>, <code>primary_period</code>.</p> |
| </div> |
| <div class="method-use-card"> |
| <h3><code>STD</code></h3> |
| <p><strong>Use when:</strong> a known seasonal period should split trend, season, and dispersion quickly.</p> |
| <p><strong>Avoid when:</strong> the main period is unknown or unstable.</p> |
| <p><strong>Key params:</strong> <code>period</code>.</p> |
| </div> |
| <div class="method-use-card"> |
| <h3><code>STDR</code></h3> |
| <p><strong>Use when:</strong> the same seasonal-trend task has outliers or noisier cycles.</p> |
| <p><strong>Avoid when:</strong> structural breaks dominate the seasonal pattern.</p> |
| <p><strong>Key params:</strong> <code>period</code>.</p> |
| </div> |
| <div class="method-use-card"> |
| <h3><code>MSSA</code></h3> |
| <p><strong>Use when:</strong> aligned channels share trend or oscillatory structure.</p> |
| <p><strong>Avoid when:</strong> channels are unrelated or one univariate method is enough.</p> |
| <p><strong>Key params:</strong> <code>window</code>, <code>rank</code>, <code>primary_period</code>.</p> |
| </div> |
| </div> |
|
|
| <h2 id="decision-flow">Decision flow</h2> |
| <div class="pipeline-panel"> |
| <div class="pipeline-flow"> |
| <div class="pipeline-step"> |
| <strong>One regular seasonal series?</strong> |
| <span>Start with <code>STD</code>. Use <code>STDR</code> if outliers matter.</span> |
| </div> |
| <div class="pipeline-step"> |
| <strong>One series, unknown components?</strong> |
| <span>Start with <code>SSA</code>, then compare against <code>STD</code> or <code>STL</code>.</span> |
| </div> |
| <div class="pipeline-step"> |
| <strong>Aligned channels?</strong> |
| <span>Use <code>MSSA</code> for shared structure; use <code>STD</code> channelwise for a fast baseline.</span> |
| </div> |
| <div class="pipeline-step"> |
| <strong>Need a specialist family?</strong> |
| <span>Move to <code>EMD</code>, <code>CEEMDAN</code>, <code>VMD</code>, <code>WAVELET</code>, <code>MVMD</code>, or <code>MEMD</code>.</span> |
| </div> |
| </div> |
| </div> |
|
|
| <h2 id="wrapper-use-cases">Wrapper use cases</h2> |
| <table> |
| <thead> |
| <tr> |
| <th>Method</th> |
| <th>Typical scenario</th> |
| <th>First parameter to check</th> |
| </tr> |
| </thead> |
| <tbody> |
| <tr> |
| <td><code>STL</code></td> |
| <td>classical seasonal-trend baseline for one known period</td> |
| <td><code>period</code></td> |
| </tr> |
| <tr> |
| <td><code>MSTL</code></td> |
| <td>one series with multiple seasonal periods</td> |
| <td><code>periods</code></td> |
| </tr> |
| <tr> |
| <td><code>ROBUST_STL</code></td> |
| <td>STL-style baseline with outliers</td> |
| <td><code>period</code></td> |
| </tr> |
| <tr> |
| <td><code>EMD</code></td> |
| <td>adaptive IMF inspection for nonlinear signals</td> |
| <td><code>n_imfs</code></td> |
| </tr> |
| <tr> |
| <td><code>CEEMDAN</code></td> |
| <td>noise-assisted EMD when mode stability matters</td> |
| <td><code>trials</code></td> |
| </tr> |
| <tr> |
| <td><code>VMD</code></td> |
| <td>band-limited modes with a chosen mode count</td> |
| <td><code>K</code>, <code>alpha</code></td> |
| </tr> |
| <tr> |
| <td><code>WAVELET</code></td> |
| <td>multiscale signal inspection</td> |
| <td><code>wavelet</code>, <code>level</code></td> |
| </tr> |
| <tr> |
| <td><code>MVMD</code></td> |
| <td>optional multivariate VMD through PySDKit</td> |
| <td><code>K</code>, <code>alpha</code></td> |
| </tr> |
| <tr> |
| <td><code>MEMD</code></td> |
| <td>optional multivariate EMD through PySDKit</td> |
| <td><code>primary_period</code></td> |
| </tr> |
| </tbody> |
| </table> |
| <h2 id="more-detail">More detail</h2> |
| <ul> |
| <li><a href="../method-matrix/">Method Matrix</a> gives a compact table across input mode, |
| maturity, dependencies, parameters, outputs, and recommended use.</li> |
| <li><a href="../config-reference/">Config Reference</a> documents exact |
| <code>DecompositionConfig</code> fields and method-specific parameters.</li> |
| <li><a href="../method-references/">Method References</a> collects primary literature and |
| official package links.</li> |
| <li><a href="../notebook-gallery/">Notebook Gallery</a> shows runnable plots for the retained |
| method surface.</li> |
| </ul></div> |
| </div> |
| </div> |
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