NumPy: Compute pearson product-moment correlation coefficients of two given arrays
10. Pearson Product-Moment Correlation Coefficients
Write a NumPy program to compute pearson product-moment correlation coefficients of two given arrays.
Sample Solution:
Python Code:
# Importing the NumPy library
import numpy as np
# Creating an array 'x' containing elements [0, 1, 3]
x = np.array([0, 1, 3])
# Creating an array 'y' containing elements [2, 4, 5]
y = np.array([2, 4, 5])
# Displaying the original array 'x'
print("\nOriginal array1:")
print(x)
# Displaying the original array 'y'
print("\nOriginal array1:")
print(y)
# Calculating the Pearson product-moment correlation coefficients of arrays 'x' and 'y' using np.corrcoef()
print("\nPearson product-moment correlation coefficients of the said arrays:\n", np.corrcoef(x, y))
Sample Output:
Original array1: [0 1 3] Original array1: [2 4 5] Pearson product-moment correlation coefficients of the said arrays: [[1. 0.92857143] [0.92857143 1. ]]
Explanation:
In the above code –
x = np.array([0, 1, 3]): This creates a NumPy array x with values [0, 1, 3].
y = np.array([2, 4, 5]): This creates a NumPy array y with values [2, 4, 5].
print(np.corrcoef(x, y)): This computes the correlation matrix between x and y, and prints it to the console.
For more Practice: Solve these Related Problems:
- Write a function that computes the Pearson correlation coefficient matrix of two 1D arrays using np.corrcoef.
- Create a program that calculates the Pearson coefficient manually and compares it with the result from np.corrcoef.
- Implement a solution that computes Pearson correlation for multi-dimensional arrays along a specified axis.
- Develop a method that tests Pearson correlation on datasets with known relationships to verify the coefficient’s accuracy.
Python-Numpy Code Editor:
Have another way to solve this solution? Contribute your code (and comments) through Disqus.Previous: Write a NumPy program to compute cross-correlation of two given arrays.
Next: Write a NumPy program to test element-wise of a given array for finiteness (not infinity or not Not a Number), positive or negative infinity, for NaN, for NaT (not a time), for negative infinity, for positive infinity.
What is the difficulty level of this exercise?
Test your Programming skills with w3resource's quiz.
- Weekly Trends and Language Statistics
- Weekly Trends and Language Statistics