Force prediction to be positive

[Lufffya]

Thank you for providing such a powerful tool ！！！

But i met a problem

The forecast is negative， so I can't use it

I've seen some of the same issues before, is there any way to solve this problem now ?

[tcuongd]

Hey, Ben summarises the strategies for positive predictions here: #1668 (comment)

There is no functionality baked in to Prophet to do this, you'll want to either:

• Clip the predictions manually (np.clip(preds, 0)), or
• If the trend uncertainty is important and you want to show that it can become positive again, use the ProphetPos class that is written in that post.

[Lufffya]

Thank you. It's very useful to me