I have df :
orgs feature1 feature2 feature3
0 org1 True True NaN
1 org1 NaN True NaN
2 org2 NaN True True
3 org3 True True NaN
4 org4 True True True
5 org4 True True True
Now i would like count the number of distinct orgs per each feature. basically to have a df_Result like this:
features count_distinct_orgs
0 feature1 3
1 feature2 4
2 feature3 2
Does anybody have an idea how to do that?
You can add sum
to previous solution :
df1 = df.groupby('orgs')
.apply(lambda x: x.iloc[:,1:].apply(lambda y: y.nunique())).sum().reset_index()
df1.columns = ['features','count_distinct_orgs']
print (df1)
features count_distinct_orgs
0 feature1 3
1 feature2 4
2 feature3 2
Another solution with aggregate
Series.nunique
:
df1 = df.groupby('orgs')
.agg(lambda x: pd.Series.nunique(x))
.sum()
.astype(int)
.reset_index()
df1.columns = ['features','count_distinct_orgs']
print (df1)
features count_distinct_orgs
0 feature1 3
1 feature2 4
2 feature3 2
Solution with stack
works, but return warning:
C:\\Anaconda3\\lib\\site-packages\\pandas\\core\\groupby.py:2937: FutureWarning: numpy not_equal will not check object identity in the future. The comparison did not return the same result as suggested by the identity (
is
)) and will change. inc = np.r_[1, val[1:] != val[:-1]]
df1 = df.set_index('orgs').stack(dropna=False)
df1 = df1.groupby(level=[0,1]).nunique().unstack().sum().reset_index()
df1.columns = ['features','count_distinct_orgs']
print (df1)
features count_distinct_orgs
0 feature1 3
1 feature2 4
2 feature3 2
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