How to filter a numpy array based on two or more conditions?
This recipe helps you filter a numpy array based on two or more conditions
Recipe Objective
How to filter a numpy array based on two or more conditions?
Creating a new array from the existing array whereas taking out some elements from that existing array and then creating a new one is called as filtering. In case of filtering the elements whose value at an index is "True" that are going to be ontained in the filtered array otherwise if the values at an index is "False" then it will be excluded from that filtered array.
Table of Contents
Step 1 - Import library
import numpy as np
Step 2 - Take a Sample array
Sample_array = np.array([55,60,65,70,75,80,85,90])
Step 3 - Create filter array
filter_array = [] ##take empty list
for values in Sample_array:
if values > 65:
filter_array.append(True) ##append values which are greater than 65
else:
filter_array.append(False) ##exclude values which are less than 65
new_filtered_array = Sample_array[filter_array] ## Apply it on the Sample array that we have taken
Step 4 - Print the results
print("The filtered array is:", new_filtered_array)
The filtered array is: [70 75 80 85 90]
Here we can see the array has been filtered, as we have pass a condition where if the values are than "65" append that values and exclude the values which are less than "65".
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