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Q:
In pandas, I want to compute a statistic on columns in a dataframe by column (one-column-per-row)
I have a dataframe in which I would like to compute a statistic for each column but by row. So if the columns were "name", "id", and "addresse", for example, the desired output would be:
name id addresse
Joe A1 B1
Joe A1 B2
Joe A2 B3
Rona A2 B4
Rona A2 B5
So by row, I mean that when we have the values in each cell, we want the value of the total for each column computed across the dataframe for that particular row. But I want this to be aggregated by row, not by column.
My current code is:
columns = ['name', 'id', 'addresse']
df = pd.DataFrame(columns=columns)
print df
for i in range(len(df)):
name = df['name']
id = df['id']
addresse = df['addresse']
print df
So what I am really trying to do is get a statistic for each column for each row, but the dataframe will never be bigger than 10,000 rows, so efficiency and speed are a concern.
A:
Try this code:
import numpy as np
import pandas as pd
columns = ['name', 'id', 'addresse']
df = pd.DataFrame(columns=columns)
total = df.aggregate(np.sum)
print df
Output:
name be359ba680
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