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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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Hi,
What is the variable I use to set the linetype of the arrow. I used arrow.linetype, it does not seem to have any effect. I need one set to be solid line and other to be dashed line. I would app…
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I'm using fviz_pca_biplot, but I would like to use custom labels for the variable names that go over the arrows so that I can include subscript, superscript etc. Is there a way to do this?
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[The **vegan** package](https://github.com/vegandevs/vegan) implements many useful ordination techniques for which it would be convenient to at least be able to extract tidy annotated matrix factors a…
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An important, but complex issue, as
- not all metrics may have uncertainty
- could make plots cluttered
Ideas would be
- to make an uncertainty circle around points
- a separate plot…
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Hi Brian,
i already changed the out-plot in order to adjust the legend position with the suggestion of=
g = plot_data(filename="isospace_plot_2", plot_save_pdf=F, plot_save_png=F, mix,source,discr…
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Hi,
I'm on a mac and when I ran the command
`qiime songbird multinomial --i-table redsea.biom.qza --m-metadata-file data/redsea/redsea_metadata.txt --p-formula "Depth+Temperature+Salinity+Oxygen+F…
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This issue is meant to organize several different issues relating to the unsupervised learning portion of the project. As the project progresses I may add more issues/checkboxes
- [x] Conduct PCA o…
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Hi there
I am trying to run the example stated in README file and got the results:
```
> z y biplot.features(y)
Error in pcaPP::PCAproj(naomit.x, k = 2, scale = sd, center = mean) :
obje…
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Could create a new vignette with some additional PCA plots
- [ ] Plot 1 loading against another; include a circle with radius = 1 indicating that the maximum value of a load is +/- 1 since it is th…