Filtering

SLAW allows filtration of the features based on two criteria, the ratio of intensity compared to blank and the fraction of detection in QC files. These two metrics are calculated after the alignment has been performed. Therefore it only has two arguments :

• filtering/fold_blank: (Float) A threshold based on the intensity of the features, which is the intensity of the features in samples of the intensity of the features in the blanks.
• filtering/fraq_qc: (Float) A threshold based on the fraction of detection of peaks for each feature in QC.

To apply a different filtering threshold, delete the datamatrix created in output/datamatrix, change the threshold and relaunch SLAW on the same folder, it will rebuild the datamatrix and recreate it with the new filtration.