title: How to scale a data set to the same scale as another?
body: <p>I’m currently scaling my training data for my regression model and the data I eventually put into the model for the prediction separately using StandardScaler.</p>
  <p>Would this scale the prediction data down to the same level as the training data’s scaling or is it different? And will it therefore lead to incorrect predictions?</p>
  <p>If so, how can I scale the second data set with the same mean etc as the training set? Would I have to manually apply the formula to the second data set using the mean and variance of the former?</p>
  <p>Thanks</p>