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Add our own version of is_sorted to check the assert

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Also caught a bug where I incorrectly assumed abs_deviations would be sorted
in MedianAbsDeviation
This commit is contained in:
Will Usher 2015-08-03 10:56:59 -06:00
parent 311b5dcc6b
commit 1ea6f73297
1 changed files with 15 additions and 0 deletions
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15
vtkm/benchmarking/Benchmarker.h
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@ -105,6 +105,19 @@
namespace vtkm {
namespace benchmarking {
namespace stats {
// Checks that the sequence is sorted, returns true if it's sorted, false
// otherwise
template<typename ForwardIt>
bool is_sorted(ForwardIt first, ForwardIt last){
ForwardIt next = first;
++next;
for (; next != last; ++next, ++first){
if (*first > *next){
return false;
}
}
return true;
}
// Get the value representing the `percent` percentile of the
// sorted samples using linear interpolation
@ -115,6 +128,7 @@ vtkm::Float64 PercentileValue(const std::vector<vtkm::Float64> &samples, const v
}
VTKM_ASSERT_CONT(percent >= 0.0);
VTKM_ASSERT_CONT(percent <= 100.0);
VTKM_ASSERT_CONT(is_sorted(samples.begin(), samples.end()));
if (percent == 100.0){
return samples.back();
}
@ -173,6 +187,7 @@ vtkm::Float64 MedianAbsDeviation(const std::vector<vtkm::Float64> &samples){
for (std::vector<vtkm::Float64>::const_iterator it = samples.begin(); it != samples.end(); ++it){
abs_deviations.push_back(vtkm::Abs(*it - median));
}
std::sort(abs_deviations.begin(), abs_deviations.end());
return PercentileValue(abs_deviations, 50.0);
}
} // stats