Sir, is the code almost same as what Prateek sir taught in the Multivariate LR video? I’ve prepared the predicted values of target and the LR score of X_test, y_pred is coming out to be 1.0. Is this fine?
Air quality challenge
Hello @geekayd,
The LR score is calculated between the true values and the predicted value. You have here calculated with xtest and ypred(assuming x_test is the testing dataset) which is wrong and obviously 1.0. As what you have given as the true value is the prediction value itself.
What score function internally does is, it predicts the values for x provided and then computes the r2 score with the predicted value and the true value.
Here you have provided xtest and ypred, so, when the score function predicts the values for xtest, its ypred only, hence giving a 1.0 score.
Hope it cleared your doubt.
Happy Learning 
Thanks
Okay, You mean to say that the LR score must be calculated between y_test(given values) and y_pred(predicted values)?
But, in this challenge, we have no y_test values. how can I calculate correct LR score?
Exactly, that’s why you cant calculate the test accuracy. Only the online judge can calculate it, and thats what your score for that challenge is.
You need to train your model with the training data such that, it performs well on unseen data. The only thing you have to guide you in this is the training accuracy and the training data.
Happy Learning 
Thank you loads!
I appreciate your patience and help.
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how to read the target values into y?
i have read the train X values using the pd.read_csv how to read the target value in y ??