Why do I get different results with row or column vectors when using the

fs = 12;

f0 = 2;

t = ((1:1024)' - 1)/fs;

x = exp(j*2*pi*f0*t) + .1*randn(1024, 1);

% These lines give different results.

fe  =   rooteig(x, 1, fs)

fe1 =   rooteig(x.', 1, fs) % Same result as before.

fe2 =   rooteig(x', 1, fs) % Different result as before.

% These lines give different results.

fm  =   rootmusic(x, 1, fs)

fm1 =   rootmusic(x.', 1, fs) % Same result as before.

fm2 =   rootmusic(x', 1, fs) % Different result as before.