title: How do you swap cell values for an entire column in a dataset?
body: <p><img src="https://i.stack.imgur.com/Uh1a1.png" alt="Heart disease dataset"></p>
  
  <p>In the "Target" column, 1 means that there is NO heart disease and 0 means that there is heart disease. This is confusing and messes with my regression results. Is there a way to simply change all 0 values to 1 and all 1 values to 0?</p>