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[bug-49202] add PERCENTRANK.EXC function 

git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@1892090 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
PJ Fanning 2021-08-07 19:28:33 +00:00
parent b1bf15e2b5
commit d2a3e63a48
4 changed files with 43 additions and 12 deletions
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6
poi/src/main/java/org/apache/poi/ss/formula/atp/PercentRankExcFunction.java
View File

@ -135,13 +135,13 @@ final class PercentRankExcFunction implements FreeRefFunction {
if (d < x) lessThanCount++;
}
BigDecimal result = new BigDecimal((double)(lessThanCount + 1) / (double)(numbers.size() + 1));
return new NumberEval(PercentRank.round(result, significance, RoundingMode.DOWN));
return new NumberEval(PercentRank.round(result, significance));
} else {
ValueEval belowRank = calculateRank(numbers, closestMatchBelow, significance, false);
ValueEval belowRank = calculateRank(numbers, closestMatchBelow, significance + 3, false);
if (!(belowRank instanceof NumberEval)) {
return belowRank;
}
ValueEval aboveRank = calculateRank(numbers, closestMatchAbove, significance, false);
ValueEval aboveRank = calculateRank(numbers, closestMatchAbove, significance + 3, false);
if (!(aboveRank instanceof NumberEval)) {
return aboveRank;
}

18
poi/src/main/java/org/apache/poi/ss/formula/functions/PercentRank.java
View File

@ -18,6 +18,7 @@
package org.apache.poi.ss.formula.functions;
import org.apache.poi.ss.formula.eval.*;
import org.apache.poi.ss.util.NumberToTextConverter;
import org.apache.poi.util.Internal;
import java.math.BigDecimal;
@ -123,13 +124,13 @@ public final class PercentRank implements Function {
return ErrorEval.NA;
}
BigDecimal result = new BigDecimal((double)lessThanCount / (double)(lessThanCount + greaterThanCount));
return new NumberEval(round(result, significance, RoundingMode.DOWN));
return new NumberEval(round(result, significance));
} else {
ValueEval belowRank = calculateRank(numbers, closestMatchBelow, significance, false);
ValueEval belowRank = calculateRank(numbers, closestMatchBelow, significance + 3, false);
if (!(belowRank instanceof NumberEval)) {
return belowRank;
}
ValueEval aboveRank = calculateRank(numbers, closestMatchAbove, significance, false);
ValueEval aboveRank = calculateRank(numbers, closestMatchAbove, significance + 3, false);
if (!(aboveRank instanceof NumberEval)) {
return aboveRank;
}
@ -142,16 +143,17 @@ public final class PercentRank implements Function {
NumberEval belowRank, NumberEval aboveRank, int significance) {
double diff = closestMatchAbove - closestMatchBelow;
double pos = x - closestMatchBelow;
double rankDiff = aboveRank.getNumberValue() - belowRank.getNumberValue();
BigDecimal result = new BigDecimal(belowRank.getNumberValue() + (rankDiff * (pos / diff)));
return new NumberEval(round(result, significance, RoundingMode.HALF_UP));
BigDecimal rankDiff = new BigDecimal(NumberToTextConverter.toText(aboveRank.getNumberValue() - belowRank.getNumberValue()));
BigDecimal result = new BigDecimal(belowRank.getNumberValue()).add(rankDiff.multiply(new BigDecimal(pos / diff)));
return new NumberEval(round(result, significance));
}
@Internal
public static double round(BigDecimal bd, int significance, RoundingMode rounding) {
public static double round(BigDecimal bd, int significance) {
//the rounding in https://support.microsoft.com/en-us/office/percentrank-function-f1b5836c-9619-4847-9fc9-080ec9024442
//is very inconsistent, this hodge podge of rounding modes is the only way to match Excel results
return bd.setScale(significance, rounding).doubleValue();
BigDecimal bd2 = bd.setScale(significance + 3, RoundingMode.HALF_UP);
return bd2.setScale(significance, RoundingMode.DOWN).doubleValue();
}
@Internal

30
poi/src/test/java/org/apache/poi/ss/formula/atp/TestPercentRankExcFunction.java
View File

@ -38,7 +38,7 @@ public class TestPercentRankExcFunction {
// PERCENTRANK.INC test case (for comparison)
@Test
void testMicrosoftExample1() throws IOException {
void testPercentRankIncExample1() throws IOException {
try (HSSFWorkbook wb = initWorkbook1()) {
HSSFFormulaEvaluator fe = new HSSFFormulaEvaluator(wb);
HSSFCell cell = wb.getSheetAt(0).getRow(0).createCell(100);
@ -53,6 +53,18 @@ public class TestPercentRankExcFunction {
}
}
//https://support.microsoft.com/en-us/office/percentrank-exc-function-d8afee96-b7e2-4a2f-8c01-8fcdedaa6314
@Test
void testMicrosoftExample1() throws IOException {
try (HSSFWorkbook wb = initWorkbook2()) {
HSSFFormulaEvaluator fe = new HSSFFormulaEvaluator(wb);
HSSFCell cell = wb.getSheetAt(0).getRow(0).createCell(100);
assertDouble(fe, cell, "PERCENTRANK.EXC(A2:A10, 7)", 0.7);
assertDouble(fe, cell, "PERCENTRANK.EXC(A2:A10,5.43)", 0.381);
assertDouble(fe, cell, "PERCENTRANK.EXC(A2:A10,5.43,1)", 0.3);
}
}
@Test
void testErrorCases() throws IOException {
try (HSSFWorkbook wb = initWorkbook1()) {
@ -82,6 +94,22 @@ public class TestPercentRankExcFunction {
return wb;
}
private HSSFWorkbook initWorkbook2() {
HSSFWorkbook wb = new HSSFWorkbook();
HSSFSheet sheet = wb.createSheet();
addRow(sheet, 0, "Data");
addRow(sheet, 1, 1);
addRow(sheet, 2, 2);
addRow(sheet, 3, 3);
addRow(sheet, 4, 6);
addRow(sheet, 5, 6);
addRow(sheet, 6, 6);
addRow(sheet, 7, 7);
addRow(sheet, 8, 8);
addRow(sheet, 9, 9);
return wb;
}
private static void confirmErrorResult(HSSFFormulaEvaluator fe, HSSFCell cell, String formulaText, FormulaError expectedResult) {
cell.setCellFormula(formulaText);
fe.notifyUpdateCell(cell);

1
poi/src/test/java/org/apache/poi/ss/formula/atp/TestPercentRankIncFunction.java
View File

@ -48,6 +48,7 @@ public class TestPercentRankIncFunction {
assertDouble(fe, cell, "PERCENTRANK.INC(A2:A11,8,2)", 0.66);
assertDouble(fe, cell, "PERCENTRANK.INC(A2:A11,8,4)", 0.6666);
assertDouble(fe, cell, "PERCENTRANK.INC(A2:A11,5)", 0.583);
assertDouble(fe, cell, "PERCENTRANK.INC(A2:A11,5,5)", 0.58333);
assertDouble(fe, cell, "PERCENTRANK.INC(A2:A11,1)", 0);
assertDouble(fe, cell, "PERCENTRANK.INC(A2:A11,13)", 1);
}