Module 10: SEM & Redundancy Analysis

Topic: Structural equation modeling (SEM), piecewise SEM, redundancy analysis (RDA), constrained ordination.

Learning Objectives

Specify and fit structural equation models with lavaan
Use piecewiseSEM for ecological path models
Perform RDA with vegan as a constrained PCA
Interpret ordination biplots

Slides

R Code

Data

travis.csv

Key Packages

library(lavaan)
library(piecewiseSEM)
library(semPlot)
library(vegan)

Final Assignment

Final Assignment due at end of finals week — submit on Canvas. See Assignments for details.

---
title: "Module 10: SEM & Redundancy Analysis"
---

::: {.week-header}
**Topic:** Structural equation modeling (SEM), piecewise SEM, redundancy analysis (RDA), constrained ordination.
:::

## Learning Objectives

- Specify and fit structural equation models with `lavaan`
- Use `piecewiseSEM` for ecological path models
- Perform RDA with `vegan` as a constrained PCA
- Interpret ordination biplots

## Slides

::: {.file-list}
- [Lecture SEM (PPTX)](../Week%2010/Lecture%20SEM.pptx)
- [Lecture RDA (PDF)](../Week%2010/Lecture%20RDA.pdf)
:::

## R Code

::: {.file-list}
- [Code SEM.R](../Week%2010/Code%20SEM.R)
- [Code RDA.R](../Week%2010/Code%20RDA.R)
:::

## Data

::: {.file-list}
- [travis.csv](../Week%2010/travis.csv)
:::

## Key Packages

```r
library(lavaan)
library(piecewiseSEM)
library(semPlot)
library(vegan)
```

## Final Assignment

**Final Assignment** due at end of finals week — submit on Canvas.
See [Assignments](../assignments.qmd) for details.