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MCOL-1983 Use long double for internal calculations of regr_*** functions.

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This commit is contained in:
David Hall
2019-01-21 14:39:51 -06:00
parent eb75d3cd7e
commit 16a6a0a27c
11 changed files with 100 additions and 100 deletions
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24
utils/regr/regr_slope.cpp
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@ -39,10 +39,10 @@ static Add_regr_slope_ToUDAFMap addToMap;
struct regr_slope_data
{
uint64_t cnt;
double sumx;
double sumx2; // sum of (x squared)
double sumy;
double sumxy; // sum of (x*y)
long double sumx;
long double sumx2; // sum of (x squared)
long double sumy;
long double sumxy; // sum of x * y
};
@ -148,16 +148,16 @@ mcsv1_UDAF::ReturnCode regr_slope::evaluate(mcsv1Context* context, static_any::a
if (N > 1)
{
// COVAR_POP(y, x) / VAR_POP(x)
double sumx = data->sumx;
double sumy = data->sumy;
double sumx2 = data->sumx2;
double sumxy = data->sumxy;
double covar_pop = N * sumxy - sumx * sumy;
double var_pop = N * sumx2 - sumx * sumx;
long double sumx = data->sumx;
long double sumy = data->sumy;
long double sumx2 = data->sumx2;
long double sumxy = data->sumxy;
long double covar_pop = N * sumxy - sumx * sumy;
long double var_pop = N * sumx2 - sumx * sumx;
if (var_pop != 0)
{
double slope = covar_pop / var_pop;
valOut = slope;
long double slope = covar_pop / var_pop;
valOut = static_cast<double>(slope);
}
}
return mcsv1_UDAF::SUCCESS;