Method powerTransformSelectedColumns

src/frontend/spreadsheet/SpreadsheetView.cpp:3108–3201

}

void SpreadsheetView::powerTransformSelectedColumns(QAction* action) {
	auto columns = selectedColumns();
	if (columns.isEmpty())
		return;

	auto power = static_cast<TukeyLadderPower>(action->data().toInt());

	WAIT_CURSOR;
	m_spreadsheet->beginMacro(i18n("%1: power transform columns", m_spreadsheet->name()));

	for (auto* col : columns) {
		if (col->columnMode() != AbstractColumn::ColumnMode::Double && col->columnMode() != AbstractColumn::ColumnMode::Integer
			&& col->columnMode() != AbstractColumn::ColumnMode::BigInt)
			continue;

		if (col->columnMode() == AbstractColumn::ColumnMode::Integer || col->columnMode() == AbstractColumn::ColumnMode::BigInt)
			col->setColumnMode(AbstractColumn::ColumnMode::Double);

		auto* data = static_cast<QVector<double>*>(col->data());
		QVector<double> new_data(col->rowCount());

		switch (power) {
		case InverseSquared: {
			for (int i = 0; i < col->rowCount(); ++i) {
				double x = data->operator[](i);
				if (x != 0.0)
					new_data[i] = 1 / gsl_pow_2(x);
				else
					new_data[i] = NAN;
			}
			break;
		}
		case Inverse: {
			for (int i = 0; i < col->rowCount(); ++i) {
				double x = data->operator[](i);
				if (x != 0.0)
					new_data[i] = 1 / x;
				else
					new_data[i] = NAN;
			}
			break;
		}
		case InverseSquareRoot: {
			for (int i = 0; i < col->rowCount(); ++i) {
				double x = data->operator[](i);
				if (x >= 0.0)
					new_data[i] = 1 / std::sqrt(x);
				else
					new_data[i] = NAN;
			}
			break;
		}
		case Log: {
			for (int i = 0; i < col->rowCount(); ++i) {
				double x = data->operator[](i);
				if (x >= 0.0)
					new_data[i] = log10(x);
				else