What is underfitting in machine learning


Are you tired of your machine learning models performing poorly on new data? Have you ever heard the term “underfitting” and wondered what it means? Well, look no further! In this blog post, we will break down exactly what underfitting is in machine learning and how it can be detrimental to your model’s performance. So, buckle up and get ready to learn about one of the most common pitfalls in the world of artificial intelligence!

What is Underfitting in Machine Learning?

Underfitting is a common problem that can arise in machine learning models. Underfitting occurs when the model does not fit the data well, and this can cause problems for the model’s performance. There are several causes of underfitting, and it can be difficult to diagnose and fix. Here are some tips for mitigating underfitting in your models:

1) Make sure your data is well-suited to the model you’re using. A properly trained model will only work well on data that matches its specifications. If your data isn’t appropriate, your model will likely underfit it.

2) Test your models frequently. Use benchmarking tools or metrics to measure how well your models perform on different types of data. This will help you identify which models are performing best and where improvements need to be made.

3) Reduce variance in your data. This is often achieved by reducing the number of features or training samples used in a model. If all of the features in a dataset are equally important, then every instance of that feature will be included in the prediction equation (i.e., there will be high variance). Reducing variance by selecting more relevant features can help improve accuracy while minimizing underfitting.

Types of Underfitting

There are a few types of underfitting in machine learning:

  1. Underfitting due to lack of data: This is the most common type of underfitting and often occurs when there is not enough data to train the model on. The model will not be able to accurately predict the behavior of data that it has not seen before.
  2. Underfitting due to insufficient feature selection: This can happen when too many features are chosen or when the features are not well selected. If too many features are chosen, the model will try to learn from all of them instead of just the ones that are useful for predicting the target variable. If features are not well selected, then the model will only use those features that seem to be relevant for predicting the target variable, which could lead to inaccurate predictions.
  3. Overfitting: This happens when the model becomes so complex that it can no longer generalize well from examples it has seen before. Overfitting means that the model is able to predict patterns in data that actually do not exist in reality. This can lead to incorrect predictions and reduced accuracy over time.

How to Reduce Underfitting in Machine Learning

In machine learning, underfitting refers to the fact that a model is not able to generalize well enough from the data it has been given. This can lead to worse learner performance and decreased accuracy. There are various ways to reduce underfitting in machine learning models, including:

1) Segmenting the data into random and test sets: By splitting the data into two sets, you can provide a more accurate estimate of how well your model will perform on this particular dataset. This helps avoid overfitting, which can occur when a model generalizes too much from the data it has been given.

2) Using a larger training set: A larger training set allows for a model to learn more about how the data behaves. As a result, it will be better equipped to generalize from this data in the future.

3) Trying different hyperparameters: Some parameters in machine learning models can play an important role in determining how well the model will perform. By adjusting these parameters, you can often improve learner performance and accuracy.


In this article, we will explore what underfitting is and how it can affect your machine-learning models. We will also provide some tips on how to deal with underfitting in your models. Hopefully, this article has helped you understand what underfitting is and the importance of dealing with it before it leads to problems in your models.

Leave a Reply

Your email address will not be published. Required fields are marked *