[python] Random state (Pseudo-random number) in Scikit learn

If you don't mention the random_state in the code, then whenever you execute your code a new random value is generated and the train and test datasets would have different values each time.

However, if you use a particular value for random_state(random_state = 1 or any other value) everytime the result will be same,i.e, same values in train and test datasets. Refer below code:

import pandas as pd 
from sklearn.model_selection import train_test_split
test_series = pd.Series(range(100))
size30split = train_test_split(test_series,random_state = 1,test_size = .3)
size25split = train_test_split(test_series,random_state = 1,test_size = .25)
common = [element for element in size25split[0] if element in size30split[0]]
print(len(common))

Doesn't matter how many times you run the code, the output will be 70.

70

Try to remove the random_state and run the code.

import pandas as pd 
from sklearn.model_selection import train_test_split
test_series = pd.Series(range(100))
size30split = train_test_split(test_series,test_size = .3)
size25split = train_test_split(test_series,test_size = .25)
common = [element for element in size25split[0] if element in size30split[0]]
print(len(common))

Now here output will be different each time you execute the code.

Examples related to python

programming a servo thru a barometer Is there a way to view two blocks of code from the same file simultaneously in Sublime Text? python variable NameError Why my regexp for hyphenated words doesn't work? Comparing a variable with a string python not working when redirecting from bash script is it possible to add colors to python output? Get Public URL for File - Google Cloud Storage - App Engine (Python) Real time face detection OpenCV, Python xlrd.biffh.XLRDError: Excel xlsx file; not supported Could not load dynamic library 'cudart64_101.dll' on tensorflow CPU-only installation

Examples related to random

How can I get a random number in Kotlin? scikit-learn random state in splitting dataset Random number between 0 and 1 in python In python, what is the difference between random.uniform() and random.random()? Generate random colors (RGB) Random state (Pseudo-random number) in Scikit learn How does one generate a random number in Apple's Swift language? How to generate a random string of a fixed length in Go? Generate 'n' unique random numbers within a range What does random.sample() method in python do?

Examples related to scikit-learn

LabelEncoder: TypeError: '>' not supported between instances of 'float' and 'str' UndefinedMetricWarning: F-score is ill-defined and being set to 0.0 in labels with no predicted samples scikit-learn random state in splitting dataset LogisticRegression: Unknown label type: 'continuous' using sklearn in python Can anyone explain me StandardScaler? ImportError: No module named model_selection How to split data into 3 sets (train, validation and test)? How to convert a Scikit-learn dataset to a Pandas dataset? Accuracy Score ValueError: Can't Handle mix of binary and continuous target How can I plot a confusion matrix?