Pandas: Generate Experiment Results in Adjacency-Like Matrix Table - pandas

Question

I have a set of experimental results (anonymised subset below) in dataframe format read from a CSV file ('Input.csv'). I want to output a table comprising the columns - 'Experimenter', 'Subject', 'F', and 'G' - in an adjacency-matrix-like format. It should include aggregating by average for multiple entries - for example, 'Alpha' and 'Bravo' - in reciprocal roles as 'Experimenter' and 'Subject'. In addition, there should be '1.00's along the main diagonal. Finally, the final output table should be written to a CSV file ('Output.csv').
Actual Input:
Day,Experimenter,Subject,D,E,F,G
Monday,Alpha,Bravo,4,2,2.68,0.44
Monday,Charlie,Delta,0,2,0.62,2.29
Monday,Echo,Foxtrot,1,2,1.03,3.14
Monday,Golf,Hotel,1,2,0.75,2.53
Tuesday,India,Juliet,2,1,0.71,1.60
Wednesday,Foxtrot,Charlie,2,0,0.48,0.61
Thursday,Delta,Hotel,2,3,2.06,1.93
Thursday,Bravo,Alpha,1,1,0.53,0.41
Friday,Bravo,Delta,1,1,1.65,0.84
Friday,Golf,Alpha,0,0,0.19,1.30
Friday,India,Echo,1,0,1.31,0.58
Expected Output:
Alpha Bravo Charlie Delta Echo Foxtrot Golf Hotel India Juliet
Alpha 1.00 1.39 0.00 0.00 0.00 0.00 1.30 0.00 0.00 0.00
Bravo 0.485 1.00 0.00 1.65 0.00 0.00 0.00 0.00 0.00 0.00
Charlie 0.00 0.00 1.00 0.62 0.00 0.61 0.00 0.00 0.00 0.00
Delta 0.00 0.84 2.29 1.00 0.00 0.00 0.00 2.06 0.00 0.00
Echo 0.00 0.00 0.00 0.00 1.00 1.03 0.00 0.00 0.58 0.00
Foxtrot 0.00 0.00 0.48 0.00 3.14 1.00 0.00 0.00 0.00 0.00
Golf 0.19 0.00 0.00 0.00 0.00 0.00 1.00 0.75 0.00 0.00
Hotel 0.00 0.00 0.00 1.93 0.00 0.00 2.53 1.00 0.00 0.00
India 0.00 0.00 0.00 0.00 1.31 0.00 0.00 0.00 1.00 0.71
Juliet 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 1.60 1.00
Code:
import numpy as np
import pandas as pd
df = pd.DataFrame({'Day': ['Monday', 'Monday', 'Monday', 'Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Thursday', 'Friday', 'Friday', 'Friday'],
'Experimenter': ['Alpha', 'Charlie', 'Echo', 'Golf', 'India', 'Foxtrot', 'Delta', 'Bravo', 'Bravo', 'Golf', 'India'],
'Subject': ['Bravo', 'Delta', 'Foxtrot', 'Hotel', 'Juliet', 'Charlie', 'Hotel', 'Alpha', 'Delta', 'Alpha', 'Echo'],
'D': [4, 0, 1, 1, 2, 2, 2, 1, 1, 0, 1],
'E': [2, 2, 2, 2, 1, 0, 3, 1, 1, 0, 0],
'F': [2.68, 0.62, 1.03, 0.75, 0.71, 0.48, 2.06, 0.53, 1.65, 0.19, 1.31],
'G': [0.44, 2.29, 3.14, 2.53, 1.60, 0.61, 1.93, 0.41, 0.84, 1.30, 0.58]})
adjacency_matrix = pd.crosstab(df['Experimenter'], df['Subject'], values=df['F'], aggfunc=np.mean)
adjacency_matrix = adjacency_matrix.fillna(0)
print('')
print(adjacency_matrix)
Actual Output:
Subject Alpha Bravo Charlie Delta Echo Foxtrot Hotel Juliet
Experimenter
Alpha 0.00 2.68 0.00 0.00 0.00 0.00 0.00 0.00
Bravo 0.53 0.00 0.00 1.65 0.00 0.00 0.00 0.00
Charlie 0.00 0.00 0.00 0.62 0.00 0.00 0.00 0.00
Delta 0.00 0.00 0.00 0.00 0.00 0.00 2.06 0.00
Echo 0.00 0.00 0.00 0.00 0.00 1.03 0.00 0.00
Foxtrot 0.00 0.00 0.48 0.00 0.00 0.00 0.00 0.00
Golf 0.19 0.00 0.00 0.00 0.00 0.00 0.75 0.00
India 0.00 0.00 0.00 0.00 1.31 0.00 0.00 0.71
which is correct but only includes column 'F' not both 'F' and 'G', as required.
Please advise?

Answer 1

The following code appears to generate the correct output (not very idiomatic, but functional):
ct_a = pd.crosstab(df['Experimenter'], df['Subject'], values=df['F'], aggfunc=np.mean).fillna(0)
ct_a.values[[np.arange(ct_a.shape[0])]*2] = 1
print('')
print(ct_a.head(23))
ct_b = pd.crosstab(df['Subject'], df['Experimenter'], values=df['G'], aggfunc=np.mean).fillna(0)
ct_b.values[[np.arange(ct_b.shape[0])]*2] = 1
print('')
print(ct_b.head(23))
a_m = (ct_a + ct_b).fillna(0)
a_m.values[[np.arange(a_m.shape[0])]*2] = 1
print('')
print(a_m.head(23))
However, I am still struggling to generate the 'Eigenvector Centrality' measure from the generated matrix (a_m) - any help would be very welcome!