plugin_spectral_cli.md

+# Using the plugin from the command line   
+The plugin will requires the following options:   
+
+| option | type | description/value |   
+| :---:    | :---:  | :---:   |   
+| --run spectral |  **MANDATORY** | name of the plugin |
+| --time_window value | **MANDATORY** | length of fft window in s |    
+| --overlap value | **MANDATORY**     | overlap length for next fft window |
+| --windowing type |  optional | a string containing either Hanning, Hamming or None |  
+
+This plugin also supports the following common options:   
+
+| option |  type |
+| :---:    | :---: |
+| --input_file |  **MANDATORY** |
+| --use_markers | optional |
+| --skip_markers | optional |
+| --output_dir | optional |
+| --output_suffix | optional |
+| --output_prefix | optional |
+
+## command line examples
+### Basic usage  
+```bash
+anywave --run spectral --input_file d:\data\myfile.eeg --time_window 1 --overlap 0.5
+```
+PSD will be computed for all channels in myfile.eeg, unless there is a myfile.eeg.mgt file.     
+PSD will be computed on the whole data unless there is a myfile.eeg.mrk file containing markers with durations.   
+The fft window will be 1s, and the fft overlap will be 0.5s.   
+The result file will go in d:\data.
+### force to compute on the whole data    
+```bash
+anywave --run spectral --input_file d:\data\myfile.eeg --time_window 1 --overlap 0.5 --use_markers all_data 
+```   
+### avoid artefacts  (assuming we have a myfile.eeg.mrk file)
+```bash
+anywave --run spectral --input_file d:\data\myfile.eeg --time_window 1 --overlap 0.5 --skip_markers artefact
+```    
+### Customize output file name
+```bash
+anywave --run spectral --input_file d:\data\myfile.eeg --time_window 1 --overlap 0.5 --output_prefix psd --output_suffix custom
+```    
+That will generate *d:\data\psd_fftwindow-1024_fftoverlap-512_windowing-hanning_custom.mat*   
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