# plot-methods: Plot an object of class "Fa" In robustfa: Object Oriented Solution for Robust Factor Analysis

 plot-methods R Documentation

## Plot an object of class "Fa"

### Description

Plot an object of class "Fa". If which = "factorScore", then a scatterplot of the factor scores is produced; if which = "screeplot", shows the eigenvalues and is helpful to select the number of factors.

### Usage

``````## S4 method for signature 'Fa'
plot(x, which=c("factorScore", "screeplot"), choices=1:2)
``````

### Arguments

 `x` an object of class `"Fa"` or of a class derived from `"Fa"` `which` indicate what kind of plot. If `which = "factorScore"`, then a scatterplot of the factor scores is produced; if `which = "screeplot"`, shows the eigenvalues and is helpful to select the number of factors. `choices` an integer vector indicate which columns of the factor scores to plot

### Details

The feasible usages are: `plot(x, which="factorScore", choices=1:2)` `plot(x, which="screeplot")`

### Methods

`signature(x = "Fa", y = "missing")`

generic functions - see `plot`

### Author(s)

Ying-Ying Zhang (Robert) robertzhangyying@qq.com

### References

Zhang, Y. Y. (2013), An Object Oriented Solution for Robust Factor Analysis.

### Examples

``````
data("hbk")
hbk.x = hbk[,1:3]

faClassicPcaReg = FaClassic(x = hbk.x, factors = 2, method = "pca",
scoresMethod = "regression"); faClassicPcaReg
summary(faClassicPcaReg)

plot(faClassicPcaReg, which = "factorScore", choices = 1:2)
plot(faClassicPcaReg, which = "screeplot")

``````

robustfa documentation built on April 16, 2023, 5:18 p.m.