R package pcadapt is a user-friendly R package for performing genome scans for local adaptation. Here, we present version 4 of pcadapt which substantially improves computational efficiency while providing similar results. This improvement is made possible by using a different format for storing genotypes and a different algorithm for computing principal components of the genotype matrix, which is the most computationally demanding step in method pcadapt. These changes are seamlessly integrated into the existing pcadapt package, and users will experience a large reduction in computation time (by a factor of 20–60 in our analyses) as compared with previous versions.

中文翻译：

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使用R软件包pcadapt版本4执行高效的基因组扫描以进行局部适应。

R软件包pcadapt是一个用户友好的R软件包，用于执行基因组扫描以进行局部适应。在这里，我们介绍pcadapt的版本4，该版本在提供相似结果的同时大大提高了计算效率。通过使用不同的格式存储基因型和使用不同的算法计算基因型矩阵的主要成分，可以使这种改进成为可能，这是方法pcadapt中最需要计算的步骤。这些更改已无缝集成到现有的pcadapt软件包中，与以前的版本相比，用户将大大减少计算时间（在我们的分析中，减少了20-60倍）。