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# 降维/排序分析(ordination analysis)
Ordination analysis(排序分析)是生态学和统计学领域中用于分析和解释多变量数据的方法之一。这个方法通常被用于探索和可视化生态学或生物学数据中的pattern,尤其是在物种组成和环境因素之间的关系方面。
[https://asa-blog.netlify.app/p/ordination-analysis/](htt…
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Hello,
I am using R version 4.1.1 and microbiotaPair version 0.0.2
I am trying to run the example
`data(physeq_data)`
`physeq
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[The ordination method section](https://microbiome.github.io/OMA/docs/devel/pages/20_beta_diversity.html#sec-unsupervised-ordination) does only describe available methods, but does not really say the …
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I am working through the Wallace v2.0 vignette, and I run into an error in Module: "Environmental Ordination":
Warning: Error in [.data.frame: undefined columns selected
2: shiny::runApp
1: run…
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Hi
I am using CCA analysis to calculate the relationship between the environmental factors and the top 10 Phylum/Genus, but I found that the RDA analysis can select the top 10 Phylum/Genus, but CCA d…
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It seems that the results of `getRDA()` function are somewhat incorrect. First of all, it does not return "loadings" as the "rotations" are empty. Moreover, the function seems to try to add "species s…
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The problem was found in reverse depedency tests for **BiodiversityR** examples:
```r
> ### Name: PCAsignificance
> ### Title: PCA Significance
> ### Aliases: PCAsignificance ordiequilibriumcircle…
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Currently, the getting started and many other examples use ehrql, but output csv.gz files rather than arrow.
csv.gz is a very expensive format CPU wise on the server, so we want users to use arrow …
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use some ordination method (PCA/RDA/NMDS) to visualize the community changing through time -- is it moving in a direction or randomly jumping around?
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I tried to load example files "distance.qza" and "ordination.qza" from [QIIME/DEICODE tutorial](https://library.qiime2.org/plugins/deicode/19/).
After downloading them I did in R:
```
distance…