sigma.push_back(xGaussianLineEdit->text().toDouble());
sigma.push_back(yGaussianLineEdit->text().toDouble());
if (mDimension > 2) sigma.push_back(zGaussianLineEdit->text().toDouble());
sigma.push_back(xGaussianLineEdit->text().toDouble());
sigma.push_back(yGaussianLineEdit->text().toDouble());
if (mDimension > 2) sigma.push_back(zGaussianLineEdit->text().toDouble());