两条曲线如何让边界连接的更光滑？

x=[0.1  4.76  6.65  9.51  12.17  15.23  17.35  19.21  22.15  23.46 27.11  28.81  29.87  30.52  30.99  32.01  33.85  34.91  37.5]
y=[6.54  5.19  4.53  4.99  2.21  6.81  6.10  8.89  4.88  3.72 3.21  2.78  3.58  2.28  2.11  2.47  2.26  1.55  6]
x1=[0.1 1.7  4.80  5.98  8.83  12.18  15.21  17.92  19.50  22.23  24.56 27.31  29.11  29.87  30.87  31.51  32.89  33.78  35.71  37.5]
y1=[6.54 19.89  24.52  34.82  40.54  37.67  41.38  30.00  19.68  14.56  18.86 17.98  21.62  17.98  14.86  12.86  10.96  8.68  9.54  6]
xx=[0.1:0.0001:37.5]
xy=[0.1 :0.0001:37.5]
yi=interp1(x,y,xx,'spline');
yy=interp1(x1,y1,xy,'spline');
plot(xx,yi,'r')
hold on
plot(xy,yy)

[Walter Roberson]

Approximate translation:

How does the two curves make the border more smooth?

Answer 1

[Faiz Gouri]

I understand that you would like to make curves more smooth. In order to do so, use smooth function or refer this article.

Hope this helps!

Answer 2

[Walter Roberson]

My thought was that to get the smoothness, it would be necessary to adjust the spline end conditions to match between the two curves, something like

temp_x = [x1(3), x1(2), x1(1), x, x1(end-2), x1(end-1), x1(end)];
temp_y = [y1(3), y1(2), y1(1), y, y1(end-2), y1(end-1), y1(end)];
temp_x1 = [x(3), x(2), x(1), x1, x(end-2), x(end-1), x(end)];
temp_y1 = [y(3), y(2), y(1), y1, y(end-2), y(end-1), y(end)];
yi = interp1(temp_x, temp_y, xx, 'spline');
yy = interp1(temp_x1, temp_y1, xy, 'spline');