Convert pandas dataframe to vector [duplicate]

Question

Is there a way to convert pandas dataframe to vectors? For example,

df
Out[53]: 
     Col1
3    Place
4    Country

Expected output

df_converted = 'Place','Country'

Expected output: df_converted = 'Place','Country' does't make sense in either Python or pandas. Do you mean a list ['Place','Country']`, a pandas array, a numpy array, numpy vector...? And what do you ultimately want to do with the list/vector, use it in a computation? — smci
– smci, Commented Feb 1, 2021 at 7:58
Also please tag and title pandas stuff pandas not just python, that will help it get seen and get you get faster answers from pandas users. — smci
– smci, Commented Feb 1, 2021 at 8:00

Maxim Ivanov · Accepted Answer · 2021-02-01 07:57:20Z

2

You can use method values on a series. This returns a numpy array.

import pandas as pd

df = pd.DataFrame({
    'Col1': ['Place', 'Country'],
    'Col2': ['This', 'That'],
})

vector = df['Col1'].values

print(vector)
print(type(vector))

Output

['Place' 'Country']
<class 'numpy.ndarray'>

answered Feb 1, 2021 at 7:57

Maxim Ivanov

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Beyza Canbay · Accepted Answer · 2021-02-01 07:53:56Z

1

Pandas dataframes are consisted of Series, the code that you shared above is about converting a Serie into a list. You can simply run following code ;

df_converted = list(df["Col1"])

If you want to convert a dataframe into another format such as a numpy array you can find more info at https://pandas.pydata.org/pandas-docs/stable/reference/api/pandas.DataFrame.to_numpy.html for the to_numpy() method.

answered Feb 1, 2021 at 7:53

Beyza Canbay

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