How to fix array shape sklearn

Question

I'm trying to understand KFolds. I have an issue, I had a huge key error that made no sense, I changed the n_splits to 5, but it throws another error. This time the n_splits can't be used when n_samples is 4. I try to change the n_samples but it throws more errors. I can't win. Have any number other than 5 and it throws a key error, have it 5 and it throws another error!
https://code.sololearn.com/cukr310h92oh/?ref=app

Steven M Sorry for asking again

EDIT: Bug fixed, but now I have bad input shape! 😒

Answer 1

Steven M Thank you for the answer. I don't really understand how to implement this. I don't know what any of this means. It seems whenever try to make a simple program, I get lead down a million rabbit holes. I tried my best to implement it, but it made twice as many errors.
https://code.sololearn.com/cukr310h92oh/?ref=app

Answer 2

Clueless Coder I wrote a quick example with the various validation functions using the cancer dataset that is built into Sci-kit Learn. You can call the KFolds in the cross_val_score function. Also, you can set your predictions calling the cross_val_predict function with your features and targets. I hope this helps. 👍👍

https://code.sololearn.com/cHHQ2iGB72ai/?ref=app

Answer 3

Clueless Coder I see the problem, your dataset is too small and when you apply the label encoder it does not meet the class requirements. To fix this, I expanded your dataset with 2 extra unique values. Weird things like this happen with small datasets. The code below generates a warning, but it executes without errors.

https://code.sololearn.com/cvIyMA3dfb95/?ref=app

Answer 4

Steven M Thanks so much! They don't tell you this stuff when learning lol.

Answer 5

Sorry, try it again, I was still playing with it

Answer 6

Clueless Coder no worries, it's all good, I would recommend getting a csv of a couple hundred rows, at least and start playing with that data, the more data, the better these models will work

Answer 7

Steven M Thanks. I think it's working now. It throws 10 warnings (once again, it thinks the n_split is 3, despite making it 6).

I don't like Sklearn 😂. The errors make no sense and always contradict each other. Change the input shape error, you do as it asks, and it throws more errors.

Answer 8

Steven M Still errors 😒. I set it as n_splits=6, but it still thinks it's n_splits=5.