title: ValueError: X has 32 features, but GradientBoostingRegressor is expecting 33 features as input
body: <p>i encountered a problem whereby i kept getting the error 'ValueError: X has 32 features, but GradientBoostingRegressor is expecting 33 features as input.'
  i have checked through all my code using.shape and it showed 33.
  However, as i tried to apply PSO to it, it kept telling me my X only has 32 featues. May i know what is wrong?</p>
  <p>Below is the link to my Github Repository! Much Appreciation in advance!</p>
  <p><a href="https://github.com/chinsiang96/Thomas-IMRE/blob/main/Gradient%20Boosting%20%26%20INVERSE%20Trial%20-%2029062022-Copy1.ipynb" rel="nofollow noreferrer">https://github.com/chinsiang96/Thomas-IMRE/blob/main/Gradient%20Boosting%20%26%20INVERSE%20Trial%20-%2029062022-Copy1.ipynb</a></p>