diff --git a/Classes/PHPExcel/Calculation/MathTrig.php b/Classes/PHPExcel/Calculation/MathTrig.php
index 2da748a..134fff7 100644
--- a/Classes/PHPExcel/Calculation/MathTrig.php
+++ b/Classes/PHPExcel/Calculation/MathTrig.php
@@ -495,13 +495,13 @@ class PHPExcel_Calculation_MathTrig {
 	 *
 	 * @access	public
 	 * @category Mathematical and Trigonometric Functions
-	 * @param	float	$value		The positive real number for which you want the logarithm
+	 * @param	float	$number		The positive real number for which you want the logarithm
 	 * @param	float	$base		The base of the logarithm. If base is omitted, it is assumed to be 10.
 	 * @return	float
 	 */
 	public static function LOG_BASE($number = NULL, $base = 10) {
 		$number	= PHPExcel_Calculation_Functions::flattenSingleValue($number);
-		$base	= (is_null($base))	? 10 :	(float) PHPExcel_Calculation_Functions::flattenSingleValue($base);
+		$base	= (is_null($base)) ? 10 : (float) PHPExcel_Calculation_Functions::flattenSingleValue($base);
 
 		if ((!is_numeric($base)) || (!is_numeric($number)))
 			return PHPExcel_Calculation_Functions::VALUE();
@@ -1252,7 +1252,8 @@ class PHPExcel_Calculation_MathTrig {
 	/**
 	 * SUMX2MY2
 	 *
-	 * @param	mixed	$value	Value to check
+	 * @param	mixed[]	$matrixData1	Matrix #1
+	 * @param	mixed[]	$matrixData2	Matrix #2
 	 * @return	float
 	 */
 	public static function SUMX2MY2($matrixData1,$matrixData2) {
@@ -1281,7 +1282,8 @@ class PHPExcel_Calculation_MathTrig {
 	/**
 	 * SUMX2PY2
 	 *
-	 * @param	mixed	$value	Value to check
+	 * @param	mixed[]	$matrixData1	Matrix #1
+	 * @param	mixed[]	$matrixData2	Matrix #2
 	 * @return	float
 	 */
 	public static function SUMX2PY2($matrixData1,$matrixData2) {
@@ -1310,7 +1312,8 @@ class PHPExcel_Calculation_MathTrig {
 	/**
 	 * SUMXMY2
 	 *
-	 * @param	mixed	$value	Value to check
+	 * @param	mixed[]	$matrixData1	Matrix #1
+	 * @param	mixed[]	$matrixData2	Matrix #2
 	 * @return	float
 	 */
 	public static function SUMXMY2($matrixData1,$matrixData2) {
diff --git a/Classes/PHPExcel/Calculation/Statistical.php b/Classes/PHPExcel/Calculation/Statistical.php
index 05dae7b..348b459 100644
--- a/Classes/PHPExcel/Calculation/Statistical.php
+++ b/Classes/PHPExcel/Calculation/Statistical.php
@@ -834,6 +834,7 @@ class PHPExcel_Calculation_Statistical {
 	 * @category Mathematical and Trigonometric Functions
 	 * @param	mixed		$arg,...		Data values
 	 * @param	string		$condition		The criteria that defines which cells will be checked.
+	 * @param	mixed[]		$averageArgs	Data values
 	 * @return	float
 	 */
 	public static function AVERAGEIF($aArgs,$condition,$averageArgs = array()) {
@@ -912,6 +913,8 @@ class PHPExcel_Calculation_Statistical {
 	 * @param	float		$probability	Probability at which you want to evaluate the distribution
 	 * @param	float		$alpha			Parameter to the distribution
 	 * @param	float		$beta			Parameter to the distribution
+	 * @param	float		$rMin			Minimum value
+	 * @param	float		$rMax			Maximum value
 	 * @param	boolean		$cumulative
 	 * @return	float
 	 *
@@ -1954,9 +1957,9 @@ class PHPExcel_Calculation_Statistical {
 	 * @param	boolean				A logical value specifying whether to return additional regression statistics.
 	 * @return	array
 	 */
-	public static function LINEST($yValues,$xValues=null,$const=True,$stats=False) {
-		$const	= (is_null($const))	? True :	(boolean) PHPExcel_Calculation_Functions::flattenSingleValue($const);
-		$stats	= (is_null($stats))	? False :	(boolean) PHPExcel_Calculation_Functions::flattenSingleValue($stats);
+	public static function LINEST($yValues, $xValues = NULL, $const = TRUE, $stats = FALSE) {
+		$const	= (is_null($const))	? TRUE :	(boolean) PHPExcel_Calculation_Functions::flattenSingleValue($const);
+		$stats	= (is_null($stats))	? FALSE :	(boolean) PHPExcel_Calculation_Functions::flattenSingleValue($stats);
 		if (is_null($xValues)) $xValues = range(1,count(PHPExcel_Calculation_Functions::flattenArray($yValues)));
 
 		if (!self::_checkTrendArrays($yValues,$xValues)) {
@@ -2059,7 +2062,9 @@ class PHPExcel_Calculation_Statistical {
 	 *
 	 * Returns the inverse of the normal cumulative distribution
 	 *
-	 * @param	float		$value
+	 * @param	float		$probability
+	 * @param	float		$mean
+	 * @param	float		$stdDev
 	 * @return	float
 	 *
 	 * @todo	Try implementing P J Acklam's refinement algorithm for greater
@@ -2088,6 +2093,8 @@ class PHPExcel_Calculation_Statistical {
 	 * with parameters mean and standard_dev.
 	 *
 	 * @param	float		$value
+	 * @param	float		$mean
+	 * @param	float		$stdDev
 	 * @return	float
 	 */
 	public static function LOGNORMDIST($value, $mean, $stdDev) {
@@ -3621,14 +3628,14 @@ class PHPExcel_Calculation_Statistical {
 	 * Returns the Weibull distribution. Use this distribution in reliability
 	 * analysis, such as calculating a device's mean time to failure.
 	 *
-	 * @param	float		$value
-	 * @param	float		$alpha		Alpha Parameter
-	 * @param	float		$beta		Beta Parameter
+	 * @param	float		$dataSet
+	 * @param	float		$m0		Alpha Parameter
+	 * @param	float		$sigma	Beta Parameter
 	 * @param	boolean		$cumulative
 	 * @return	float
 	 *
 	 */
-	public static function ZTEST($dataSet, $m0, $sigma=null) {
+	public static function ZTEST($dataSet, $m0, $sigma = NULL) {
 		$dataSet	= PHPExcel_Calculation_Functions::flattenArrayIndexed($dataSet);
 		$m0			= PHPExcel_Calculation_Functions::flattenSingleValue($m0);
 		$sigma		= PHPExcel_Calculation_Functions::flattenSingleValue($sigma);
diff --git a/Classes/PHPExcel/Calculation/TextData.php b/Classes/PHPExcel/Calculation/TextData.php
index d08829c..46decb3 100644
--- a/Classes/PHPExcel/Calculation/TextData.php
+++ b/Classes/PHPExcel/Calculation/TextData.php
@@ -89,7 +89,7 @@ class PHPExcel_Calculation_TextData {
 	/**
 	 * TRIMNONPRINTABLE
 	 *
-	 * @param	mixed	$value	Value to check
+	 * @param	mixed	$stringValue	Value to check
 	 * @return	string
 	 */
 	public static function TRIMNONPRINTABLE($stringValue = '') {
@@ -113,7 +113,7 @@ class PHPExcel_Calculation_TextData {
 	/**
 	 * TRIMSPACES
 	 *
-	 * @param	mixed	$value	Value to check
+	 * @param	mixed	$stringValue	Value to check
 	 * @return	string
 	 */
 	public static function TRIMSPACES($stringValue = '') {
@@ -133,7 +133,7 @@ class PHPExcel_Calculation_TextData {
 	/**
 	 * ASCIICODE
 	 *
-	 * @param	string	$character	Value
+	 * @param	string	$characters		Value
 	 * @return	int
 	 */
 	public static function ASCIICODE($characters) {
@@ -296,7 +296,9 @@ class PHPExcel_Calculation_TextData {
 	/**
 	 * FIXEDFORMAT
 	 *
-	 * @param	mixed	$value	Value to check
+	 * @param	mixed		$value	Value to check
+	 * @param	integer		$decimals
+	 * @param	boolean		$no_commas
 	 * @return	boolean
 	 */
 	public static function FIXEDFORMAT($value, $decimals = 2, $no_commas = FALSE) {
@@ -407,7 +409,6 @@ class PHPExcel_Calculation_TextData {
 	 * STRINGLENGTH
 	 *
 	 * @param	string	$value	Value
-	 * @param	int		$chars	Number of characters
 	 * @return	string
 	 */
 	public static function STRINGLENGTH($value = '') {
@@ -485,9 +486,10 @@ class PHPExcel_Calculation_TextData {
 	/**
 	 * REPLACE
 	 *
-	 * @param	string	$value	Value
-	 * @param	int		$start	Start character
-	 * @param	int		$chars	Number of characters
+	 * @param	string	$oldText	String to modify
+	 * @param	int		$start		Start character
+	 * @param	int		$chars		Number of characters
+	 * @param	string	$newText	String to replace in defined position 
 	 * @return	string
 	 */
 	public static function REPLACE($oldText = '', $start = 1, $chars = null, $newText) {
@@ -553,7 +555,7 @@ class PHPExcel_Calculation_TextData {
 	/**
 	 * RETURNSTRING
 	 *
-	 * @param	mixed	$value	Value to check
+	 * @param	mixed	$testValue	Value to check
 	 * @return	boolean
 	 */
 	public static function RETURNSTRING($testValue = '') {
@@ -570,6 +572,7 @@ class PHPExcel_Calculation_TextData {
 	 * TEXTFORMAT
 	 *
 	 * @param	mixed	$value	Value to check
+	 * @param	string	$format	Format mask to use
 	 * @return	boolean
 	 */
 	public static function TEXTFORMAT($value,$format) {