interp1_lq.m

关于样条插值均匀与非均匀的示例

clear
x = 0:2:24;
y = [12 9 9 10 18 24 28 27 25 20 18 15 13];
x1 = 13;
% y1 = interp1(x, y, x1);

% y2 = interp1(x, y, x1, 'spline');

xi = 0:24/100:24;
% y1i = interp1(x, y, xi);
y2i = interp1(x, y, xi, 'spline');

plot(x, y, 'o',  xi, y2i, '-.');