From 2532c1e221c985bf27a95f93791889d828d73d15 Mon Sep 17 00:00:00 2001
From: Abbas Pak <153980246+AbbasPak@users.noreply.github.com>
Date: Tue, 14 May 2024 23:03:34 +0330
Subject: [PATCH] Update README.md

---
 README.md | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/README.md b/README.md
index 17cf7d6..cc67070 100644
--- a/README.md
+++ b/README.md
@@ -31,10 +31,14 @@ library(ggtext)
 library("readxl")
 library(ggpubr)
 ```
-_Step 2. Data Standardization:_ PCA begins by standardizing the dataset to ensure that all variables have zero mean and unit variance. This step is important because variables with larger scales can disproportionately influence the PCA results.
+_Step 2. Data Standardization:_ PCA begins by standardizing the dataset to ensure that all variables have zero mean and unit variance. This step is important because variables with larger scales can disproportionately influence the PCA results. For standardizing features, use *scale(df)*.
 
 _Step 3. Conduct PCA:_
-Here, we use  `FactoMineR` and `FactoExtra` packages which provide additional tools for enhancing the visualization and interpretation of PCA results. These packages offer functions for generating scree plots, biplots, and cluster analysis based on PCA.
+Perform PCA and disply the results by using 
+
+*pca3 <- PCA(df)*
+
+*pca3$eig*
 
 _Step 4. Visualize PCA Results:_
 *Biplots* are a valuable tool for visualizing relationships between variables and observations in multivariate datasets. They offer a concise graphical summary of the data's structure, providing insights that may not be readily apparent from the raw data alone. In a biplot, both the observations (data points) and variables (features) are represented within the same plot. The axes of the plot are defined by the principal components obtained from PCA. The data points are projected onto this reduced-dimensional space, indicating their positions.