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While some microorganisms cause diseases, most of them help in biological processes such as decomposition, fermentation and nutrient cycling. Much research has been conducted on the study of microbial communities in various environments and how their interactions and relationships can provide insight into various diseases. Co-occurrence network inference algorithms help us understand the complex associations of micro-organisms, especially bacteria. Existing network inference algorithms employ techniques such as correlation, regularized linear regression, and conditional dependence, which have different hyper-parameters that determine the sparsity of the network. These complex microbial communities form intricate ecological networks that are fundamental to ecosystem functioning and host health. Understanding these networks is crucial for developing targeted interventions in both environmental and clinical settings. The emergence of high-throughput sequencing technologies has generated unprecedented amounts of microbiome data, necessitating robust computational methods for network inference and validation.<\/jats:p>\n          <\/jats:sec>\n          <jats:sec>\n            <jats:title>\n              <jats:bold>Results<\/jats:bold>\n            <\/jats:title>\n            <jats:p>Previous methods for evaluating the quality of the inferred network include using external data, and network consistency across sub-samples, both of which have several drawbacks that limit their applicability in real microbiome composition data sets. We propose a novel cross-validation method to evaluate co-occurrence network inference algorithms, and new methods for applying existing algorithms to predict on test data. Our method demonstrates superior performance in handling compositional data and addressing the challenges of high dimensionality and sparsity inherent in real microbiome datasets. The proposed framework also provides robust estimates of network stability.<\/jats:p>\n          <\/jats:sec>\n          <jats:sec>\n            <jats:title>\n              <jats:bold>Conclusions<\/jats:bold>\n            <\/jats:title>\n            <jats:p>Our empirical study shows that the proposed cross-validation method is useful for hyper-parameter selection (training) and comparing the quality of inferred networks between different algorithms (testing). This advancement represents a significant step forward in microbiome network analysis, providing researchers with a reliable tool for understanding complex microbial interactions. The method\u2019s applicability extends beyond microbiome studies to other fields where network inference from high-dimensional compositional data is crucial, such as gene regulatory networks and ecological food webs. Our framework establishes a new standard for validation in network inference, potentially accelerating discoveries in microbial ecology and human health.<\/jats:p>\n          <\/jats:sec>","DOI":"10.1186\/s12859-025-06083-7","type":"journal-article","created":{"date-parts":[[2025,3,6]],"date-time":"2025-03-06T03:04:47Z","timestamp":1741230287000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":2,"title":["Cross-validation for training and testing co-occurrence network inference algorithms"],"prefix":"10.1186","volume":"26","author":[{"given":"Daniel","family":"Agyapong","sequence":"first","affiliation":[]},{"given":"Jeffrey Ryan","family":"Propster","sequence":"additional","affiliation":[]},{"given":"Jane","family":"Marks","sequence":"additional","affiliation":[]},{"given":"Toby Dylan","family":"Hocking","sequence":"additional","affiliation":[]}],"member":"297","published-online":{"date-parts":[[2025,3,6]]},"reference":[{"issue":"3","key":"6083_CR1","doi-asserted-by":"publisher","first-page":"e00124","DOI":"10.1128\/mSystems.00124-19","volume":"4","author":"X Lv","year":"2019","unstructured":"Lv X, Zhao K, Xue R, Liu Y, Xu J, Ma B. 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