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update _g_div_gp

This commit is contained in:
黄东杰 2023-11-23 18:27:55 +08:00
parent 9965dc74db
commit 8b859879e4
2 changed files with 20 additions and 5 deletions
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13
poi/src/main/java/org/apache/poi/ss/formula/functions/Rate.java
View File

@ -74,11 +74,14 @@ public class Rate implements Function {
}
private static double _g_div_gp(double r, double n, double p, double x, double y, double w) {
double t1 = Math.pow(r+1, n);
double t2 = Math.pow(r+1, n-1);
return (y + t1*x + p*(t1 - 1)*(r*w + 1)/r) /
(n*t2*x - p*(t1 - 1)*(r*w + 1)/(Math.pow(r, 2) + n*p*t2*(r*w + 1)/r +
p*(t1 - 1)*w/r));
double t1 = Math.pow(r + 1.0, n);
double t2 = Math.pow(r + 1.0, n - 1.0);
double g = y + t1 * x + p * (t1 - 1.0) * (r * w + 1.0) / r;
double gp = (n * t2 * x
- p * (t1 - 1.0) * (r * w + 1.0) / (Math.pow(r, 2.0))
+ n * p * t2 * (r * w + 1.0) / r
+ p * (t1 - 1.0) * w / r);
return g / gp;
}
/**

12
poi/src/test/java/org/apache/poi/ss/formula/functions/TestRate.java
View File

@ -169,4 +169,16 @@ final class TestRate {
assertDouble(fe, cell, "RATE(360.0,6.56,-2000.0)", 0.0009480170844060, 0.000001);
}
}
@Test
void testBugxxxxx() throws Exception {
try (HSSFWorkbook wb = new HSSFWorkbook()) {
HSSFSheet sheet = wb.createSheet();
HSSFRow row = sheet.createRow(0);
HSSFFormulaEvaluator fe = new HSSFFormulaEvaluator(wb);
HSSFCell cell = row.createCell(0);
assertDouble(fe, cell, "RATE(22,30000,20000,-82257625,0,0.1)", 0.35397960290713076, 0.000001);
assertDouble(fe, cell, "RATE(22,10000,10000,-313562750,0,0.1)", 0.5252278265995758, 0.000001);
}
}
}