I have a requirement where in I am trying to count the values and Put them in the pivot table.
This is my dataframe,
Cola Colb
Apple Rippened
Orange Rippened
Apple UnRippened
Mango UnRippened
I want the Output to be like this,
Rippened UnRippened
Apple 1 1
Mango 0 1
Orange 1 0
Kindly share your thoughts.
I love this question....
Option 1
pd.get_dummies(df.Cola).T.dot(pd.get_dummies(df.Colb))
Rippened UnRippened
Apple 1 1
Mango 0 1
Orange 1 0
Option 2
i, r = pd.factorize(df.Cola.values)
j, c = pd.factorize(df.Colb.values)
n, m = r.size, c.size
b = np.bincount(i * m + j, minlength=n * m).reshape(n, m)
pd.DataFrame(b, r, c)
Rippened UnRippened
Apple 1 1
Orange 1 0
Mango 0 1
Option 3
df.groupby(['Cola', 'Colb']).size().unstack(fill_value=0)
Colb Rippened UnRippened
Cola
Apple 1 1
Mango 0 1
Orange 1 0
Option 4
df.groupby('Cola').Colb.value_counts().unstack(fill_value=0)
Colb Rippened UnRippened
Cola
Apple 1 1
Mango 0 1
Orange 1 0
Using my favourite: pd.crosstab
df = pd.crosstab(df.Cola, df.Colb)
print(df)
Colb Rippened UnRippened
Cola
Apple 1 1
Mango 0 1
Orange 1 0
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