edit vignettes/preprocessing

Author: Carol-seven

vignettes/preprocessing.qmd

@@ -79,7 +79,7 @@ specify the `fileName` to read the raw data file into R.
 first load the data file directly, then specify the `dataSet` in the function.
 
 
-### 2. Filters out identified proteins that contain no quantitative values (uncommon for Spectronaut-based results, can occur in MaxQuant-based results)
+### 2. Filters out identified proteins that exhibit `NaN` quantitative values
 
 
 `NaN`, which stands for "Not a Number," can be found in the `PG.Quantity` column
@@ -92,7 +92,7 @@ very similar or identical m/z values that lead to difficulty in parsing out
 individual intensity profiles.
 
 
-### 3. Filters out proteins with < 2 unique peptide identifications
+### 3. Applies a unique peptides per protein filter
 
 
 General practice in the proteomics field is to filter out proteins which were