1 | initial version |
One approach to calculate pairwise mutual information using numpy is as follows:
Here's an example code snippet:
import numpy as np
from sklearn.metrics import mutual_info_score
# load data as a numpy array
data = np.loadtxt("data.csv", delimiter=",")
# define function to calculate mutual information
def calc_mutual_info(x, y):
return mutual_info_score(x, y)
# initialize matrix to store mutual info values
n_vars = data.shape[1]
mi_matrix = np.zeros((n_vars, n_vars))
# calculate mutual information between each pair of variables
for i in range(n_vars):
for j in range(i+1, n_vars):
mi = calc_mutual_info(data[:,i], data[:,j])
mi_matrix[i,j] = mi
mi_matrix[j,i] = mi
# display results
print(mi_matrix)
Note that we use sklearn.metrics.mutual_info_score
to calculate the mutual information between two variables. We also use a nested loop to calculate the mutual information between each pair of variables, assuming that the data is stored as a matrix where each column represents a variable. Finally, we store the results in a matrix where each element represents the mutual information between two variables.