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Posted to commits@commons.apache.org by se...@apache.org on 2011/10/10 04:33:30 UTC
svn commit: r1180764 - /commons/proper/math/trunk/src/main/java/org/apache/commons/math/util/FastMathLiteralArrays.java

Author: sebb
Date: Mon Oct 10 02:33:30 2011
New Revision: 1180764

URL: http://svn.apache.org/viewvc?rev=1180764&view=rev
Log:
Recover table Javadoc lost when tables extrtacted from FastMath source file

Modified:
    commons/proper/math/trunk/src/main/java/org/apache/commons/math/util/FastMathLiteralArrays.java

Modified: commons/proper/math/trunk/src/main/java/org/apache/commons/math/util/FastMathLiteralArrays.java
URL: http://svn.apache.org/viewvc/commons/proper/math/trunk/src/main/java/org/apache/commons/math/util/FastMathLiteralArrays.java?rev=1180764&r1=1180763&r2=1180764&view=diff
==============================================================================
--- commons/proper/math/trunk/src/main/java/org/apache/commons/math/util/FastMathLiteralArrays.java (original)
+++ commons/proper/math/trunk/src/main/java/org/apache/commons/math/util/FastMathLiteralArrays.java Mon Oct 10 02:33:30 2011
@@ -23,7 +23,9 @@ package org.apache.commons.math.util;
  * @version $Id$
  */
 class FastMathLiteralArrays {
-    /** "EXP_INT_A" table. */
+    /** Exponential evaluated at integer values,
+     * exp(x) =  expIntTableA[x + EXP_INT_TABLE_MAX_INDEX] + expIntTableB[x+EXP_INT_TABLE_MAX_INDEX].
+     */
     private static final double[] EXP_INT_A = new double[] {
         +0.0d,
         Double.NaN,
@@ -1527,7 +1529,9 @@ class FastMathLiteralArrays {
         Double.NaN,
     };
 
-    /** "EXP_INT_B" table. */
+    /** Exponential evaluated at integer values,
+     * exp(x) =  expIntTableA[x + EXP_INT_TABLE_MAX_INDEX] + expIntTableB[x+EXP_INT_TABLE_MAX_INDEX]
+     */
     private static final double[] EXP_INT_B = new double[] {
         +0.0d,
         Double.NaN,
@@ -3032,7 +3036,10 @@ class FastMathLiteralArrays {
     };
 
 
-    /** "EXP_FRAC_A" table. */
+    /** Exponential over the range of 0 - 1 in increments of 2^-10
+     * exp(x/1024) =  expFracTableA[x] + expFracTableB[x].
+     * 1024 = 2^10
+     */
     private static final double[] EXP_FRAC_A = new double[] {
       +1.0d,
       +1.0009770393371582d,
@@ -4061,7 +4068,9 @@ class FastMathLiteralArrays {
       +2.7182817459106445d,
     };
 
-    /** "EXP_FRAC_B" table. */
+    /** Exponential over the range of 0 - 1 in increments of 2^-10
+     * exp(x/1024) =  expFracTableA[x] + expFracTableB[x].
+     */
     private static final double[] EXP_FRAC_B = new double[] {
       +0.0d,
       +1.552583321178453E-10d,
@@ -5090,7 +5099,7 @@ class FastMathLiteralArrays {
       +8.254840070367875E-8d,
     };
 
-    /** "LN_MANT" table. */
+    /** Extended precision logarithm table over the range 1 - 2 in increments of 2^-10. */
     private static final double[][] LN_MANT = new double[][] {
       {+0.0d,                   +0.0d,                   }, // 0
       {+9.760860120877624E-4d,  -3.903230345984362E-11d, }, // 1