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[apps/probability] Handle a == b case in finite integral computation

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For non continuous distributions, P(a <= X <= a) is not necessarily
null.
This commit is contained in:
Léa Saviot
2020-03-16 10:05:22 +01:00
committed by EmilieNumworks
parent d222d13156
commit 5c70fdc7a6
1 changed files with 4 additions and 1 deletions
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5
apps/probability/distribution/distribution.cpp
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@@ -25,9 +25,12 @@ double Distribution::rightIntegralFromAbscissa(double x) const {
}
double Distribution::finiteIntegralBetweenAbscissas(double a, double b) const {
if (b <= a) {
if (b < a) {
return 0.0;
}
if (a == b) {
return evaluateAtDiscreteAbscissa(a);
}
if (isContinuous()) {
return cumulativeDistributiveFunctionAtAbscissa(b) - cumulativeDistributiveFunctionAtAbscissa(a);
}