RuntimeWarning: invalid value encountered in divide

[Und3r1ine]

There is a RuntimeWarning in Fusion Retrieval: invalid value encountered in divide.
The related code is

vector_scores = 1 - (vector_scores - np.min(vector_scores)) / (np.max(vector_scores) - np.min(vector_scores))                                                        
bm25_scores = (bm25_scores - np.min(bm25_scores)) / (np.max(bm25_scores) -  np.min(bm25_scores))    

A suggestion to add an epsilon to prevent division by zero issues.

epsilon = 1e-8
vector_scores = 1 - (vector_scores - np.min(vector_scores)) / (np.max(vector_scores) - np.min(vector_scores) + epsilon)                                                        
bm25_scores = (bm25_scores - np.min(bm25_scores)) / (np.max(bm25_scores) -  np.min(bm25_scores) + epsilon)    

[NirDiamant]

Hi, thanks for that. would you like to open a PR and with a fix?

[HagaiAstrin]

Hi, thanks for that. would you like to open a PR and with a fix?

Hey, I opened a PR with a fix.

[NirDiamant]

thanks, merged!