That's a nice looking Bohemian Eigenfish you got there...

on 11 Oct 2021

% Learn more about Bohemian matrices

% https://blogs.mathworks.com/cleve/2019/06/24/bohemian-matrices-in-the-matlab-gallery/?s_tid=srchtitle_bohemian_1

% http://www.bohemianmatrices.com/

m=[0 0 -1 -1;1 -1 0 0;0 1 NaN 0;1 0 -1 NaN];

ix=find(isnan(m));

ixa=ix(1);

ixb=ix(2);

for n=1:1e4

m(ix)=rand(2,1)*6 - 3;

e=eig(m);

e(imag(e)==0)=[];

line(real(e),imag(e),'LineStyle','none', ...

'Marker','.','Color',[0 0 0],'MarkerSize',1)

end

axis equal off