Underfitted— Generalized — Overfitted
A brief note on how bias and variance makes a model as Underfitted or Generalized or Overfitted!
In this post, instead of writing so many paragraphs I just made an info-graphic for ease of understanding.
A model could fit the training and testing data very poorly (high bias and low variance) — left most graph in above Info-graphic. This is known as underfitted.
A modelcan fit the training data very well and the testing data very poorly. (low bias and high variance) — Right most graph in above Info-graphic. This is known as overfitted.
An ideal model should be low in Bias and also low in Variance.
This post is a very small one because I do not want readers to confuse more.
Please leave your comments if you have any other idea on Bias-Variance, Overfitting & Underfitting.
If you want to dig more into Bias — Variance please read my previous blog Overfitting — Bias — Variance — Regularization.