diff --git a/README.md b/README.md
index 2aa3ca9..7c0820b 100644
--- a/README.md
+++ b/README.md
@@ -156,23 +156,3 @@ $ snaptools snap-add-bmat  \
 	--bin-size-list 5000 10000  \
 	--verbose=True
 ```
-
-**Step 6. Cell-by-gene Matrix**.        
-We next create the cell-by-gene matrix which is later used for cluster annotation.
-
-```bash
-$ snaptools snap-add-gmat  \
-	--snap-file=demo.snap  \
-	--gene-file=gencode.vM16.gene.bed  \
-	--verbose=True
-```
-
-**Step 7. Cell-by-peak Matrix**.          
-We next create the cell-by-peak matrix which is later used for differential analysis.
-
-```bash
-$ snaptools snap-add-pmat  \
-	--snap-file=demo.snap  \
-	--peak-file=peak.bed   \
-	--verbose=True
-```