Bug 54535: Bug in INTERCEPT and SLOPE, review and integration test added to FormulaEvalTestData.xls

git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@1538772 13f79535-47bb-0310-9956-ffa450edef68

src/java/org/apache/poi/ss/formula/functions/LinearRegressionFunction.java

 			super(1);
 			_value = value;
 		}
-		@Override
+
 		protected ValueEval getItemInternal(int index) {
 			return _value;
 		}
 			super(1);
 			_ref = ref;
 		}
-		@Override
+
 		protected ValueEval getItemInternal(int index) {
 			return _ref.getInnerValueEval();
 		}
 			_ae = ae;
 			_width = ae.getWidth();
 		}
-		@Override
+
 		protected ValueEval getItemInternal(int index) {
 			int rowIx = index / _width;
 			int colIx = index % _width;
 			ValueEval arg0, ValueEval arg1) {
 		double result;
 		try {
-			ValueVector vvX = createValueVector(arg0);
-			ValueVector vvY = createValueVector(arg1);
+			ValueVector vvY = createValueVector(arg0);
+			ValueVector vvX = createValueVector(arg1);
 			int size = vvX.getSize();
 			if (size == 0 || vvY.getSize() != size) {
 				return ErrorEval.NA;
 		ErrorEval firstXerr = null;
 		ErrorEval firstYerr = null;
 		boolean accumlatedSome = false;
-		double result = 0.0;
         // first pass: read in data, compute xbar and ybar
         double sumx = 0.0, sumy = 0.0;
         

src/testcases/org/apache/poi/ss/formula/functions/TestIntercept.java

 
 	public void testBasic() {
 		Double exp = Math.pow(10, 7.5);
-		ValueEval[] xValues = {
+		ValueEval[] yValues = {
 			new NumberEval(3+exp),
 			new NumberEval(4+exp),
 			new NumberEval(2+exp),
 			new NumberEval(4+exp),
 			new NumberEval(7+exp),
 		};
-		ValueEval areaEvalX = createAreaEval(xValues);
+		ValueEval areaEvalY = createAreaEval(yValues);
 
-		ValueEval[] yValues = {
+		ValueEval[] xValues = {
 			new NumberEval(1),
 			new NumberEval(2),
 			new NumberEval(3),
 			new NumberEval(5),
 			new NumberEval(6),
 		};
-		ValueEval areaEvalY = createAreaEval(yValues);
+		ValueEval areaEvalX = createAreaEval(xValues);
 		confirm(INTERCEPT, areaEvalX, areaEvalY, -24516534.39905822);
 		// Excel 2010 gives -24516534.3990583
 	}
 	 * number of items in array is not limited to 30
 	 */
 	public void testLargeArrays() {
-		ValueEval[] xValues = createMockNumberArray(100, 3); // [1,2,0,1,2,0,...,0,1]
-		xValues[0] = new NumberEval(2.0); // Changes first element to 2
-		ValueEval[] yValues = createMockNumberArray(100, 101); // [1,2,3,4,...,99,100]
+		ValueEval[] yValues = createMockNumberArray(100, 3); // [1,2,0,1,2,0,...,0,1]
+		yValues[0] = new NumberEval(2.0); // Changes first element to 2
+		ValueEval[] xValues = createMockNumberArray(100, 101); // [1,2,3,4,...,99,100]
 
 		confirm(INTERCEPT, createAreaEval(xValues), createAreaEval(yValues), 51.74384236453202);
 		// Excel 2010 gives 51.74384236453200
 		confirmError(areaEvalX, areaEvalX, ErrorEval.REF_INVALID);
 
 		// search for errors array by array, not pair by pair
-		confirmError(areaEvalX, areaEvalY, ErrorEval.REF_INVALID);
-		confirmError(areaEvalY, areaEvalX, ErrorEval.NULL_INTERSECTION);
+		confirmError(areaEvalX, areaEvalY, ErrorEval.NULL_INTERSECTION);
+		confirmError(areaEvalY, areaEvalX, ErrorEval.REF_INVALID);
 	}
 
     /**

src/testcases/org/apache/poi/ss/formula/functions/TestSlope.java

 
 	public void testBasic() {
 		Double exp = Math.pow(10, 7.5);
-		ValueEval[] xValues = {
+		ValueEval[] yValues = {
 			new NumberEval(3+exp),
 			new NumberEval(4+exp),
 			new NumberEval(2+exp),
 			new NumberEval(4+exp),
 			new NumberEval(7+exp),
 		};
-		ValueEval areaEvalX = createAreaEval(xValues);
+		ValueEval areaEvalY = createAreaEval(yValues);
 
-		ValueEval[] yValues = {
+		ValueEval[] xValues = {
 			new NumberEval(1),
 			new NumberEval(2),
 			new NumberEval(3),
 			new NumberEval(5),
 			new NumberEval(6),
 		};
-		ValueEval areaEvalY = createAreaEval(yValues);
+		ValueEval areaEvalX = createAreaEval(xValues);
 		confirm(SLOPE, areaEvalX, areaEvalY, 0.7752808988764045);
 		// Excel 2010 gives 0.775280898876405
 	}
 	 * number of items in array is not limited to 30
 	 */
 	public void testLargeArrays() {
-		ValueEval[] xValues = createMockNumberArray(100, 3); // [1,2,0,1,2,0,...,0,1]
-		xValues[0] = new NumberEval(2.0); // Changes first element to 2
-		ValueEval[] yValues = createMockNumberArray(100, 101); // [1,2,3,4,...,99,100]
+		ValueEval[] yValues = createMockNumberArray(100, 3); // [1,2,0,1,2,0,...,0,1]
+		yValues[0] = new NumberEval(2.0); // Changes first element to 2
+		ValueEval[] xValues = createMockNumberArray(100, 101); // [1,2,3,4,...,99,100]
 
 		confirm(SLOPE, createAreaEval(xValues), createAreaEval(yValues), -1.231527093596059);
 		// Excel 2010 gives -1.23152709359606
 		confirmError(areaEvalX, areaEvalX, ErrorEval.REF_INVALID);
 
 		// search for errors array by array, not pair by pair
-		confirmError(areaEvalX, areaEvalY, ErrorEval.REF_INVALID);
-		confirmError(areaEvalY, areaEvalX, ErrorEval.NULL_INTERSECTION);
+		confirmError(areaEvalX, areaEvalY, ErrorEval.NULL_INTERSECTION);
+		confirmError(areaEvalY, areaEvalX, ErrorEval.REF_INVALID);
 	}
 }