How to plot eigenvalues on R?

1
votes

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!

2
rmatrixploteigenvalue

2 Answers

2
votes

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)

Or with pluck

library(tidyverse)
map(eig, pluck, "values") %>%
     unlist
0
votes

If you want a base R solution you can turn this into a 

mats <-  matrix(unlist(lapply(e, function(x) lapply(x, unlist)$values)), ncol = 2, byrow = T)