Скачать или смотреть R Error in colMeans(x, na.rm = TRUE) : ‘x’ must be numeric (3 Examples) | Apply prcomp() Function

How to debug the “Error in colMeans(x, na.rm = TRUE) : ‘x’ must be numeric” in the R programming language. More details: https://statisticsglobe.com/r-error-c...
R code of this video:

set.seed(67932) # Create example data frame
data ＜- data.frame(x1 = sample(LETTERS[1:3], 10, replace = TRUE),
x2 = round(rnorm(10), 2),
x3 = round(runif(10), 2))
data # Print example data frame

prcomp(data) # Try to apply prcomp function

data_new1 ＜- data[ , unlist(lapply(data, # Remove non-numeric columns
is.numeric))]
data_new1 # Print updated data frame

prcomp(data_new1) # Apply prcomp function

data_new2 ＜- data # Duplicate data frame
data_new2$x1 ＜- as.numeric(as.factor(data_new2$x1)) # Convert categories to numbers
data_new2 # Print updated data frame

prcomp(data_new2) # Apply prcomp function

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