• PROFESSIONAL CERTIFICATION IN SUPPLY CHAIN MANAGEMENT AND ANALYTICS
    Co-created with IIT Roorkee
    4.8 out of 5 by 469 learners
    4x
  • CERTIFICATION IN SOFTWARE ENGINEERING FOR CLOUD, BLOCKCHAIN AND IOT
    Co-created with IIT Guwahati
    4.8 out of 5 by 815 learners
    4x
  • CERTIFICATION IN ARTIFICIAL INTELLIGENCE and MACHINE LEARNING
    Co-created with IIT Guwahati
    4.8 out of 5 by 621 learners
    4x
  • Post Graduate Program in Analytics and Artificial Intelligence
    Co-created with UCLA Extension
    4.6 out of 5 by 1937 learners
    12 X industry demand
  • Machine Learning and Deep Learning Prodegree
    Co-created with IBM
    4.6 out of 5 by 3487 learners
    32 X industry demand
  • POST GRADUATE PROGRAM IN DATA ANALYTICS and MACHINE LEARNING
    4.8 out of 5 by 3278 learners
    14 X industry demand
  • Data Science Prodegree
    Co-created with KPMG in India
    4.7 out of 5 by 6233 learners
    16 X industry demand

Data scientists are required to obtain, pre-process, and analyze data. Companies can use the insights gathered by data scientists for making important business decisions. While this task seems straightforward, there is a multitude of challenges witnessed by a career in data science.

All seems to be a tedious task, right from learning the fundamentals from data science courses to generating data science. But the major challenge lies in data cleaning for any data science operation. To be specific, 70 percent of the work of a data scientist consists of cleaning and preparing data.

Data Science CoursesAn imbalanced dataset is a typical example of unbalanced data. Let us see how to use the Near-Miss Algorithm for imbalanced datasets.

What is an Imbalance Dataset?

For classification problems, imbalanced datasets are a special case where the distribution between classes is not uniform. They are usually composed of two classes: the majority or negative class and the minority class which is also known as the positive class.

Imagine, in your dataset, you have two categories to predict: Category-A and Category-B. You have a problem with imbalanced datasets when Category-A is higher than Category-B or vice versa.

So how could this be a problem?

Imagine that Category-A contains 90 records in a dataset of 100 rows and Category-B contains 10 records. You run a model for machine learning and end up with 90 percent precision. Then comes the certainty check and you get to realize that the results are not accurate. This is a common error caused by imbalanced datasets.

Near-Miss Algorithm

The Near-miss Algorithm is used to balance an imbalanced dataset and is considered as an algorithm for undersampling and is one of the most powerful ways to balance data.

The Near-Miss algorithm works by observing the class distribution, removing samples located in the higher class. Simply put, if the algorithm witnesses a case in which two near points that pertain to different classes occur, it simply excludes the one from the higher class and ensures that the balance is preserved.

Types of Near-Miss Algorithm

There are 3 main versions of the near-miss algorithm. They are listed as follows:

Type 1: In this type of Near-Miss Algorithm, unbalanced data is improvised by assessing the minimum distance (avg) between the large distribution and three farther small distribution.

Type 2: In this version, the balancing of data occurs by figuring out the distance between ‘n’ neighbors of the data points belonging to smaller classes. The largest distance obtained from this calculation is eliminated.

Type 3: This version involves the calculation of the minimum or shortest base distance between the larger distribution and three other smaller distributions close to it.

Using the Near-Miss Algorithm for an unbalanced dataset

To use the Near-Miss Algorithm for an unbalanced dataset, three major steps are followed. As a part of the first step, the distance between the points belonging to the larger class and the point belonging to the smaller class is considered.

This is done to ensure that the undersampling process is simplified. Moving to the second part, the instances belonging to the larger class are selected. While selecting these instances, it should be noted that only those who have the shortest distance are chosen. As a final step, the algorithm returns m*n instances from the larger class.

Conclusion

The choice for an appropriate method depends on the dataset and the approach as desired by the user. Near-Miss is a popular undersampling technique that is used to deal with imbalanced classes.

However, it is not the only one. Other methods of dealing with unbalanced data include random sampling, SMOTE, etc. Therefore, make sure you are thoroughly aware of the technique before proceeding with it.

For Online Course Enquiries
About Imarticus
Imarticus Learning is India’s leading professional education institute that offers training in Financial Services, Data Analytics & Technology. We’ve successfully transformed careers of over 35,000+ individuals globally through our Certification, Prodegree, and Post Graduate programs offered in association with leading and renowned global organisations in the Financial Services, Data Analytics & Technology domain.
Related course
  • Analytics
    PROFESSIONAL CERTIFICATION IN SUPPLY CHAIN MANAGEMENT AND ANALYTICS
    Co-created with IIT Roorkee
    Course duration()
    Upcoming batches
    1
    Organizations enrolled
    20
    4.8 out of 5 by 469 learners
    4x
    Upcoming Batches
    Date Location Schedule
    21st November ONLINE Online
    Date Location Schedule
  • Placement Assistance
    CERTIFICATION IN SOFTWARE ENGINEERING FOR CLOUD, BLOCKCHAIN AND IOT
    Co-created with IIT Guwahati
    Course duration()
    Upcoming batches
    1
    Organizations enrolled
    20
    4.8 out of 5 by 815 learners
    4x
    Upcoming Batches
    Date Location Schedule
    ONLINE Online
    Date Location Schedule
  • Placement Assistance
    CERTIFICATION IN ARTIFICIAL INTELLIGENCE and MACHINE LEARNING
    Co-created with IIT Guwahati
    Course duration(Months)
    8
    Upcoming batches
    1
    Organizations enrolled
    20
    4.8 out of 5 by 621 learners
    4x
    Upcoming Batches
    Date Location Schedule
    23rd October ONLINE Online
    Date Location Schedule
  • POST GRADUATE PROGRAM
    Post Graduate Program in Analytics and Artificial Intelligence
    Co-created with UCLA Extension
    Course duration(Weeks)
    28
    Upcoming batches
    2
    Organizations enrolled
    20
    4.6 out of 5 by 1937 learners
    12 X industry demand
    Upcoming Batches
    Date Location Schedule
    10th March CHENNAI Weekend
    Date Location Schedule
    27th March BANGALORE-KORAMANGALA Weekend
  • Prodegree
    Machine Learning and Deep Learning Prodegree
    Co-created with IBM
    Course duration(Months)
    4
    Upcoming batches
    3
    Organizations enrolled
    20
    4.6 out of 5 by 3487 learners
    32 X industry demand
    Upcoming Batches
    Date Location Schedule
    20th March CHENNAI Weekend
    27th March BANGALORE-KORAMANGALA Weekday
    Date Location Schedule
    20th March BANGALORE-KORAMANGALA Weekend
  • Post Graduation
    POST GRADUATE PROGRAM IN DATA ANALYTICS and MACHINE LEARNING
    Course duration(Months)
    5
    Upcoming batches
    1
    Organizations enrolled
    20
    4.8 out of 5 by 3278 learners
    14 X industry demand
    Upcoming Batches
    Date Location Schedule
    30th October CHENNAI Weekend
    Date Location Schedule
  • Prodegree
    Data Science Prodegree
    Co-created with KPMG in India
    Course duration(Months)
    2-4
    Upcoming batches
    1
    Organizations enrolled
    20
    4.7 out of 5 by 6233 learners
    16 X industry demand
    Upcoming Batches
    Date Location Schedule
    9th October ANDHERI Weekend
    Date Location Schedule