fail to use topN_cold

[wyfoffice]

fail to use topN_cold

[david-cortes]

I'm sorry but I cannot see the error from the ipython notebook as it seems it failed earlier and didn't run all the code. Nevertheless, this could perhaps be caused by:

• Passing more than 1 user (or more than 1 row, with attributes for the same user).
• Some problem with pandas or numpy (please try using the latest versions if possible).

[wyfoffice]

sorry, I shall upload the jupyter notebook that shows the error
cmf with cold start-Copy1.zip

[david-cortes]

Oops yeah that's an error there, will correct it later today - thanks for reporting it! In the meantime, you can pass offsets_model=False and it should work fine with it. Also just FYI, the parameters cols_bin_user and cols_bin_item are ignored when using offsets_model=True.

In the mean time, if you want to fix it yourself, you can go to line 1807 of cmfrec/__init__.py (if you're using anaconda and installed it with pip, this is typically under some path like anaconda3/lib/python3.6/site-packages/, and change it from:
user_vec = attributes.reshape(1,-1).dot(self.C).astype(self.A.dtype)
to:
user_vec = attributes.reshape(1,-1).dot(self.C).astype(self.A.dtype).reshape(-1)

[wyfoffice]

thanks! I will have a try!

[david-cortes]

Fixed the bug now in github and pip. Please install the latest version from pip (you might need to do a forced reinstalled or an update) and confirm that it's corrected.

[wyfoffice]

sure!