我的数据集（sp.abd）有 4 个物种。每行代表四个季节的一个站点。我还有每个站点温度、湿度和 pH 值的环境数据。但是，我不知道如何使用 ggplot2 覆盖环境 dbRDA。还有其他使用 baseplot 的示例，但不确定如何使用 autoplot。同样，我可以将其添加到集群图中吗？
#Environemnt Data
temp <- rnorm(72, mean = 12, sd = 5)
moist <- rnorm(72, mean = 20, sd = 20)
ph <- rnorm(72, mean = 4, sd = 2)
season <- rep(c("Summer", "Autumn","Winter", "Spring"), each = 18)
envvar <- data.frame(temp, moist, ph, season)
#Species Abundance Data
sp1 <- rnorm(72, mean = 4, 1)
sp2 <- rnorm(72, mean = 2, 1)
sp3 <- rnorm(72, mean = 3, 1)
sp4 <- rnorm(72, mean = 9, 1)
sp.abd <- data.frame(sp1, sp2, sp3, sp4, season)
env.dbrda <- dbrda(dp.abd[,-5] ~ ., as.data.frame(envvar[,-4]))
#Plotting PCA
library(ggfortify)
df <- sp.abd [1:4]
pca_res <- prcomp(df, scale. = TRUE)
screeplot(pca_res)
autoplot(pca_res, data = sp.abd, colour = 'season',
loadings = TRUE, loadings.colour = 'blue',
loadings.label = TRUE, loadings.label.size = 3)
#Plotting Clusters
library(cluster)
library(ggfortify)
autoplot(pam(df, 4), frame = TRUE, frame.type = 'norm') + theme_classic()