N = 15;
x = linspace(0,5,N)';
y = 1.3*x + 0.5*randn(N,1);
% 0. plot data and lsline
plot(x,y,'o')
lsline
% 1. find handle to lsline
h_lsline = findobj(get(gca,'Children'),'Tag','lsline');
% 2. switch off, i.e. remove lsline
set(h_lsline,'Visible','off');
Cheers
