Update README.md

README.md

@@ -19,5 +19,5 @@ The counts are normalized according to the length of the marker gene to a defaul
 
 For each sample, we can aggregate them with the following command:
 ```
-python3 build_matrix.py sample1_aggregated.tsv sample1_aggregated.tsv output_counts.tsv output_taxonomy.tsv
+python3 build_matrix.py sample1_aggregated.tsv sample2_aggregated.tsv ... output_counts.tsv output_taxonomy.tsv
 ```