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A '''dataset''' is a collection of structured or unstructured data used in various fields, such as [[machine learning]], [[data science]], and [[artificial intelligence]]. High-quality datasets are essential for training and evaluating machine learning models, as they directly impact the performance and [[generalization]] capabilities of these models.

== Data quality ==
In machine learning, the quality of a dataset is crucial for the success of a model. High-quality data should be accurate, complete, consistent, and relevant to the problem being addressed. The presence of noise, missing values, or inconsistencies in the data can lead to poor model performance and hinder the ability to draw meaningful conclusions from the results. Ensuring data quality involves various preprocessing techniques, such as [[data cleaning]], [[normalization]] and transformation.

== Synthesized datasets ==

Synthesized datasets are artificially generated data that mimic the characteristics of real-world data. They can be used to overcome limitations in real-world data, such as scarcity, privacy concerns, or imbalanced class distributions. They can also be used to improve the robustness of machine learning models by exposing them to a wider range of input variations.

== Self-supervised learning ==

[[Self-supervised learning]] is a type of unsupervised learning where a model learns to generate labels for unlabeled data by exploiting the inherent structure of the data for use in a downstream task. This approach can be particularly useful when labeled data is scarce or expensive to obtain. Self-supervised learning techniques include [[contrastive learning]], [[clustering]], and predicting future states in time-series data. By generating labels for unlabeled data, self-supervised learning can help improve the performance of machine learning models and enable them to generalize better to new, unseen data.

== See also ==

* [[List of datasets]]
* [[Data preprocessing]]
* [[Data augmentation]]

== External links ==

* [https://huggingface.co/datasets HuggingFace] - A platform for sharing and discovering datasets
* [https://www.kaggle.com/datasets Kaggle Datasets] - Another platform for sharing and discovering datasets
* [https://datasetsearch.research.google.com/ Google Dataset Search] - A search engine for finding datasets across the web
* [https://archive.ics.uci.edu/ml/index.php UCI Machine Learning Repository] - A collection of datasets for machine learning research

[[Category:Machine learning]]
[[Category:Data science]]
[[Category:Artificial intelligence]]