diff --git a/Axel/src/de/hs_mannheim/informatik/spreadsheet/Spreadsheet.java b/Axel/src/de/hs_mannheim/informatik/spreadsheet/Spreadsheet.java
index a606258..eae19ed 100644
--- a/Axel/src/de/hs_mannheim/informatik/spreadsheet/Spreadsheet.java
+++ b/Axel/src/de/hs_mannheim/informatik/spreadsheet/Spreadsheet.java
@@ -54,6 +54,10 @@ public class Spreadsheet {
 		return get(getRow(cellName), getCol(cellName));
 	}
 
+	public String getCellName(int row, int col) {
+		return "" + ((char) ('A' + col)) + (row+1);
+	}
+
 	private void put(int row, int col, String value) {
 		if (!value.startsWith("="))
 			cells[row][col].setValue(value);
@@ -248,6 +252,21 @@ public class Spreadsheet {
 		result /= counter;
 		return result;
 	}
+	private double standardDeviation(String startCellName, String endCellName){
+		ArrayList<String> cellNames = new ArrayList<>();
+
+		long avg = 0;
+		int counter = 0;
+		for(int r = getRow(startCellName); r<getRow(endCellName)+1; r++)
+			for(int c = getCol(startCellName); c<getCol(endCellName)+1; c++)
+				try {
+					avg += Long.parseLong(cells[r][c].getValue());
+					counter ++;
+					cellNames.add(getCellName(r, c));
+				} catch (NumberFormatException n){}
+		avg /= counter;
+		return 0;
+	}
 
 	/**
 	 * This method calculates the result of a "normal" algebraic expression. It only needs to support