diff --git a/ArrayOperations.c b/ArrayOperations.c
index 434d10b..8132889 100644
--- a/ArrayOperations.c
+++ b/ArrayOperations.c
@@ -47,6 +47,14 @@ void* checkedCalloc(size_t vectorLength, size_t sizeOfType) {
     return allocated;
 }
 
+void incrementVector(double* vector, int vectorLength) {
+    int i = 0;
+    for (i = 0; i < vectorLength; i++)
+    {
+        vector[i]++; /*C indexes from 0 not 1*/
+    }/*for length of array */
+}/* incrementVector(double*,int) */
+
 void printDoubleVector(double *vector, int vectorLength)
 {
   int i;
diff --git a/ArrayOperations.h b/ArrayOperations.h
index 3700258..20f88da 100644
--- a/ArrayOperations.h
+++ b/ArrayOperations.h
@@ -7,7 +7,7 @@
 ** 
 ** Author: Adam Pocock
 ** Created 17/2/2010
-** Updated - 22/02/2014 - Added checking on calloc.
+** Updated - 22/02/2014 - Added checking on calloc, and an increment array function.
 **
 **  Copyright 2010,2014 Adam Pocock, The University Of Manchester
 **  www.cs.manchester.ac.uk
@@ -41,6 +41,11 @@ extern "C" {
 *******************************************************************************/
 void* checkedCalloc(size_t vectorLength, size_t sizeOfType);
 
+/*******************************************************************************
+** Increments each value in a double array
+*******************************************************************************/
+void incrementVector(double* vector, int vectorLength);
+
 /*******************************************************************************
 ** Simple print functions for debugging
 *******************************************************************************/