Assign colors to different columns in PCA chart.

[Hector]

Hi, I am starting to use this program and I am just beginning to familiarize myself with this language.

My problem is that I have a data matrix with 12 columns, that is, 12 variables and I need to make a PCA graph where each variable has a different color.

With the help of a tutorial I wrote the following code:

datos= Nogal_sequia_pca
attach(Nogal_sequia_pca)
summary(datos)

myPr <- prcomp(datos[1:12], scale = TRUE)
myPr
summary(myPr)
plot(myPr, type = "l")

biplot(myPr, scale = 0)
str(myPr)
myPr$x
datos2 <- cbind(datos, myPr$x[, 1:2])
head(datos2)

install.packages("ggplot2")
library(ggplot2)

Then, the rest of the tutorial does not help me since the graph separates by color according to another column with categorical variables.

I enclose an image with the data matrix. Beforehand thank you very much!

[andresrcs]

Hi!

To help us help you, could you please prepare a reproducible example (reprex) illustrating your issue? Please have a look at this guide, to see how to create one:

FAQ: How to do a minimal reproducible example ( reprex ) for beginners

A minimal reproducible example consists of the following items: A minimal dataset, necessary to reproduce the issue The minimal runnable code necessary to reproduce the issue, which can be run on the given dataset, and including the necessary information on the used packages. Let's quickly go over each one of these with examples: Minimal Dataset (Sample Data) You need to provide a data frame that is small enough to be (reasonably) pasted on a post, but big enough to reproduce your issue. Let's say, as an example, that you are working with the iris data frame head(iris) #> Sepal.Length Sepal.Width Petal.Length Petal.Width Species #> 1 5.1 3.5 1.4 0.…