ValueError: Number of features of the model must match the input

[alaaanam]

I am using random forest model to predict the sales quantity. I have listed all parts in a row based while the quantity is in a monlthy based (each column represent a month) During splitting the data in to train and test: the training data will have less columns than the test set. meaning that I added one month to the test data. when i run the model, an error is rasied : ValueError: Number of features of the model must match the input. Model n_features is 22 and input n_features is 23.

Could you please help me on how to tackle this problem.

your help is really appreciated, thanks in Advanced

[Kolawoler]

Hi, I think i had the same challenge some weeks ago. But this is the issue.

Call the transform method only on your training set. do not use fit_transform method on your set, use just the transform method.