Mats Wichmann wrote: > On 06/20/2018 02:04 PM, Glenn Schultz wrote: >> All, >> >> I have a pandas dataframe and a predict result (numpy array) of a >> classifier [[0,1],[1,0]]. What I would like to do is as the positive to >> the pandas dataframe. I use predict[:,1] to slice the postive from >> numpy which gives me a row of the result. but I cannot concat to the >> pandas df['result'] = predict[:,1] does not work and I have tried >> various ways to do this with no result. I am missing something here. > > You should take a look here: > > https://pandas.pydata.org/community.html > > History has indicated that the Python tutor group isn't overloaded with > Pandas experts. You may still get an answer here, but that page suggests > the preferred places from the community to interact with to get good > answers. There's also a Google Groups which doesn't seem to be > mentioned on the page: > > https://groups.google.com/forum/#!forum/pydata
Regardless of the chosen forum, try to be as precise as possible with your problem description. It really can't get any worse than "does not work". I tried but failed to reproduce your problem from what little information you provide: >>> a = np.array([[0,1],[1,0]]) >>> df = pd.DataFrame([[1,2], [3,4]], columns=["a", "b"]) >>> df["result"] = a[:,1] >>> df a b result 0 1 2 1 1 3 4 0 Please take the time to read http://sscce.org/ to learn how you can improve your question. You'll be rewarded with better answers from us or by the real experts elsewhere. Thank you. _______________________________________________ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: https://mail.python.org/mailman/listinfo/tutor
