Check the Modes of Interpolation

x = 0:10;
y = sin(x);
xi = 0:0.1:10;

yi1 = interp1(x,y,xi,'spline');
yi2 = interp1(x,y,xi,'linear');
yi3 = interp1(x,y,xi,'nearest');
yi4 = interp1(x,y,xi,'cubic');

figure(1)
plot(x,y,'o',xi,yi1)
title('spline キュービックスプライン内挿 ')
figure(2)
plot(x,y,'o',xi,yi2)
title('linear 線形内挿(デフォルト) ')
figure(3)
plot(x,y,'o',xi,yi3)
title('nearest 最近傍内挿 ')
figure(4)
plot(x,y,'o',xi,yi4)
title('cubic 区分的キュービックエルミート内挿 ')

Published with MATLAB® 7.2