How to plot eigenvalues on R?

Question

I generated 1000 2x2 random matrices with:

M=lapply(1:1000, function(z) matrix(runif(1000,min=-10,max=10), ncol = 2, nrow = 2)) eig=lapply(M, eigen)

Thank you so much in advance!

Answer 1

We can extract the 'values' from a list using [[ by looping over the elements of list with sapply and this is done with base R

out <- c(sapply(eig, `[[`, "values"))
plot(out)

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Or with pluck

library(tidyverse)
map(eig, pluck, "values") %>%
     unlist