C++ (Cpp) MutableLinRegrState Examples

Example #1

File: linear.cpp Project: cabiling/madlib

AnyType
linregr_merge_states::run(AnyType& args) {
    MutableLinRegrState stateLeft = args[0].getAs<MutableByteString>();
    LinRegrState stateRight = args[1].getAs<ByteString>();

    stateLeft << stateRight;
    return stateLeft.storage();
}

Example #2

File: linear.cpp Project: KevinYL/madlib

AnyType
linregr_transition::run(AnyType& args) {
    MutableLinRegrState state = args[0].getAs<MutableByteString>();
    double y = args[1].getAs<double>();
    MappedColumnVector x = args[2].getAs<MappedColumnVector>();

    state << MutableLinRegrState::tuple_type(x, y);
    return state.storage();
}

Example #3

File: linear.cpp Project: cabiling/madlib

// -----------------------------------------------------------------------
// Linear regression
// -----------------------------------------------------------------------
AnyType
linregr_transition::run(AnyType& args) {
    MutableLinRegrState state = args[0].getAs<MutableByteString>();
    if (args[1].isNull() || args[2].isNull()) { return args[0]; }
    double y = args[1].getAs<double>();
    MappedColumnVector x;
    try {
        MappedColumnVector xx = args[2].getAs<MappedColumnVector>();
        x.rebind(xx.memoryHandle(), xx.size());
    } catch (const ArrayWithNullException &e) {
        return args[0];
    }

    state << MutableLinRegrState::tuple_type(x, y);
    return state.storage();
}