From: PJ Fanning <fanningpj@apache.org>
Date: Fri, 4 Feb 2022 13:36:10 +0000 (+0000)
Subject: add besselj function
X-Git-Tag: REL_5_2_1~102
X-Git-Url: https://source.dussan.org/?a=commitdiff_plain;h=39b134acaed66f4f7136c20306850275662b26eb;p=poi.git

add besselj function

git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@1897765 13f79535-47bb-0310-9956-ffa450edef68
---

diff --git a/poi/src/main/java/org/apache/poi/ss/formula/functions/BesselJ.java b/poi/src/main/java/org/apache/poi/ss/formula/functions/BesselJ.java
index 74b12db2f8..9da3e3bb4a 100644
--- a/poi/src/main/java/org/apache/poi/ss/formula/functions/BesselJ.java
+++ b/poi/src/main/java/org/apache/poi/ss/formula/functions/BesselJ.java
@@ -52,9 +52,9 @@ public final class BesselJ extends Fixed2ArgFunction implements FreeRefFunction
                 return ErrorEval.NUM_ERROR;
             }
 
-            org.apache.commons.math3.special.BesselJ bes = new org.apache.commons.math3.special.BesselJ(order);
+            final double result = org.apache.commons.math3.special.BesselJ.value(order, xval);
 
-            return new NumberEval(bes.value(xval));
+            return new NumberEval(result);
         } catch (EvaluationException e) {
             return e.getErrorEval();
         }
diff --git a/poi/src/test/java/org/apache/poi/ss/formula/functions/TestBesselJ.java b/poi/src/test/java/org/apache/poi/ss/formula/functions/TestBesselJ.java
index e3420503a8..cfe1f6ff7a 100644
--- a/poi/src/test/java/org/apache/poi/ss/formula/functions/TestBesselJ.java
+++ b/poi/src/test/java/org/apache/poi/ss/formula/functions/TestBesselJ.java
@@ -63,6 +63,7 @@ final class TestBesselJ {
             double tolerance = 0.000001;
             assertDouble(fe, cell, "BESSELJ(1.9, 2)", 0.329925829, tolerance);
             assertDouble(fe, cell, "BESSELJ(1.9, 2.5)", 0.329925829, tolerance);
+            assertDouble(fe, cell, "BESSELJ(12.4,7)", -0.217156767, tolerance);
         }
     }