From 5ac663447c962a368eba00dc89e1c4bf67ef2128 Mon Sep 17 00:00:00 2001
From: Alex Herbert <a.herbert@sussex.ac.uk>
Date: Thu, 14 Nov 2024 14:36:47 +0000
Subject: [PATCH] Update to Commons Numbers implementation of reference Erf
 function

---
 .../test/java/uk/ac/sussex/gdsc/core/utils/MathUtilsTest.java | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/gdsc-core/src/test/java/uk/ac/sussex/gdsc/core/utils/MathUtilsTest.java b/gdsc-core/src/test/java/uk/ac/sussex/gdsc/core/utils/MathUtilsTest.java
index 520f8d1e..0bf69e82 100644
--- a/gdsc-core/src/test/java/uk/ac/sussex/gdsc/core/utils/MathUtilsTest.java
+++ b/gdsc-core/src/test/java/uk/ac/sussex/gdsc/core/utils/MathUtilsTest.java
@@ -31,8 +31,8 @@
 import java.math.BigDecimal;
 import java.math.MathContext;
 import java.util.function.DoubleUnaryOperator;
-import org.apache.commons.math3.special.Erf;
 import org.apache.commons.numbers.core.Sum;
+import org.apache.commons.numbers.gamma.Erf;
 import org.apache.commons.rng.UniformRandomProvider;
 import org.apache.commons.statistics.descriptive.Mean;
 import org.junit.jupiter.api.Assertions;
@@ -848,7 +848,7 @@ void testErf(RandomSeed seed) {
     for (int i = 0; i < 10; i++) {
       final double x = r.nextDouble();
       for (int j = 1; j <= 5; j++) {
-        Assertions.assertEquals(Erf.erf(x * j), MathUtils.erf(x * j), 1e-6);
+        Assertions.assertEquals(Erf.value(x * j), MathUtils.erf(x * j), 1e-6);
       }
     }
   }