Scree plot

Shows the proportion of variance explained by each principal component, as bars with a cumulative line. It is the customary aid for deciding how many components to retain.

Usage

scree_plot(x, cols = NULL, scale = TRUE, n = NULL, title = NULL)

Arguments

x

A data frame, or a stats::prcomp() object.

cols

When x is a data frame, the numeric columns to analyse.

scale

Whether to scale variables to unit variance before the PCA.

n

Maximum number of components to display.

title

Plot title.

Value

A ggplot2::ggplot object.

Examples

scree_plot(wellbeing_survey,
           cols = c("age", "income", "stress", "sleep_hours",
                    "exercise_days", "life_satisfaction"))