<h2 id="heading-introduction">Introduction</h2>
<p>In this article, I will introduce holdout validation and several common cross-validation methods.</p>
<p>I have created some beautiful illustrations to help understand these concepts.</p>
<h2 id="heading-holdout-validation">Holdout Validation</h2>
<p><img src="https://dev-to-uploads.s3.amazonaws.com/uploads/articles/4iovqb9rmse8q5a2pwrz.png" alt="cross-validation-1" /></p>
<h2 id="heading-leave-p-out-cross-validationlpocv">Leave-p-out Cross-Validation(LpOCV)</h2>
<p><img src="https://dev-to-uploads.s3.amazonaws.com/uploads/articles/u6uncg4qg8vf3cbctww6.png" alt="cross-validation-2" /></p>
<h2 id="heading-leave-one-out-cross-validationloocv">Leave-one-out Cross-Validation(LOOCV)</h2>
<p><img src="https://dev-to-uploads.s3.amazonaws.com/uploads/articles/mukxgzy1bjao6jt0nuvv.png" alt="cross-validation-3" /></p>
<h2 id="heading-k-fold-cross-validation">K-Fold Cross-Validation</h2>
<p><img src="https://dev-to-uploads.s3.amazonaws.com/uploads/articles/nuof217uv8wmucv8z1s9.png" alt="cross-validation-4" /></p>
<h2 id="heading-repeated-random-subsampling-validation">Repeated Random Subsampling Validation</h2>
<p><img src="https://dev-to-uploads.s3.amazonaws.com/uploads/articles/zitdg7szzvj537h1wuqp.png" alt="cross-validation-5" /></p>


## Introduction
In this article, I will introduce holdout validation and several common cross-validation methods.

I have created some beautiful illustrations to help understand these concepts.

## Holdout Validation


![cross-validation-1](https://dev-to-uploads.s3.amazonaws.com/uploads/articles/4iovqb9rmse8q5a2pwrz.png)

## Leave-p-out Cross-Validation(LpOCV)

![cross-validation-2](https://dev-to-uploads.s3.amazonaws.com/uploads/articles/u6uncg4qg8vf3cbctww6.png)

## Leave-one-out Cross-Validation(LOOCV)

![cross-validation-3](https://dev-to-uploads.s3.amazonaws.com/uploads/articles/mukxgzy1bjao6jt0nuvv.png)

## K-Fold Cross-Validation


![cross-validation-4](https://dev-to-uploads.s3.amazonaws.com/uploads/articles/nuof217uv8wmucv8z1s9.png)

## Repeated Random Subsampling Validation


![cross-validation-5](https://dev-to-uploads.s3.amazonaws.com/uploads/articles/zitdg7szzvj537h1wuqp.png)


Cross-Validation Clearly Explained in 5 Graphs

Introduction

Holdout Validation

Leave-p-out Cross-Validation(LpOCV)

Leave-one-out Cross-Validation(LOOCV)

K-Fold Cross-Validation

Repeated Random Subsampling Validation