how can I plotting one over other?

hi all the attached figure is contains of 2 curves, those are which I want to plot them over each other by using statistical way (mean) how should I do that? thank you in advance.

[Azzi Abdelmalek]

Following figures?

[lina]

I attached it right now

[lina]

i attached it right now

Answer 1

[Walter Roberson]

all_x = unique([blue_x, red_x]);
in_common_range = min(blue_x) <= all_x & all_x <= max(blue_x) & min(red_x) <= all_x & all_x <= max(red_x);
common_x = all_x(in_common_range);
blue_projected = interp1(blue_x, blue_y, common_x);
red_projected = interp1(red_x, red_y, common_x);
mean_x = (blue_projected + red_projected)./2;

plot(common_x, mean_x, 'g')

[lina]

>> x = unique([out(:,6),pred(:,1)]); ??? Error using ==> horzcat CAT arguments dimensions are not consistent.

I get this error

[Walter Roberson]

all_x = unique([out(:,6); pred(:,1)]);