More like this?
%% Set up the data (just enough to need a large legend and to show variety)
t = linspace(0, 1, 11);
x = linspace(0, 1, 100)';
L = [6 2 3 7];
xi = [0, -0.02, -0.2, -0.5];
%% Start plotting
% Use an extra two plots spaces in subplot where the legend will go
figind = [1 2 4 5]; % locations where we actually want to plot data
figure(1)
for i=1:length(L)
subplot(2, 3, figind(i))
A = xi(i) ./ (1 + exp(-xi(i)*t.*x)); % the data to plot
plot(x, A)
xlabel('x')
ylabel('y')
title(['L = ', int2str(L(i)), ' \xi = ', num2str(round(xi(i),2))])
end
subplot (2, 3, [3 6])
plot(x, nan)
legend(sprintfc('t = %0.2f', t), 'Location', 'west');
axis off
