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45 lines
1.0 KiB
C++
45 lines
1.0 KiB
C++
#include <AggregateFunctions/AggregateFunctionFactory.h>
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#include <AggregateFunctions/CrossTab.h>
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#include <AggregateFunctions/FactoryHelpers.h>
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#include <memory>
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#include <cmath>
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namespace DB
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{
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namespace
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{
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struct CramersVData : CrossTabData
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{
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static const char * getName()
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{
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return "cramersV";
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}
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Float64 getResult() const
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{
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if (count < 2)
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return std::numeric_limits<Float64>::quiet_NaN();
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UInt64 q = std::min(count_a.size(), count_b.size());
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return sqrt(getPhiSquared() / (q - 1));
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}
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};
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}
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void registerAggregateFunctionCramersV(AggregateFunctionFactory & factory)
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{
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factory.registerFunction(CramersVData::getName(),
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[](const std::string & name, const DataTypes & argument_types, const Array & parameters, const Settings *)
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{
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assertBinary(name, argument_types);
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assertNoParameters(name, parameters);
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return std::make_shared<AggregateFunctionCrossTab<CramersVData>>(argument_types);
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});
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}
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}
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