splineex.mht

来自「it is a very essential matlab code.」· MHT 代码 · 共 34 行

MHT
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Date: Tue, 12 May 2009 09:50:19 -0700
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% demonstrate spline and polyint functions

clear;                                 % clear variables

min = -5;                              % range of x values
max = 5;
x = min:1:max;                         % define x values

y = sin(x);	                       % define y values

xi = min:0.1:max;                      % x values to be interpolated at
yi = spline(x,y,xi);                   % spline interpolation
yii = polyint(x,y,xi);                 % polynomial interpolation

plot (x,y,'o',xi,yi,'-',xi,yii,'-.');  % plot and compare

legend('raw data','cubic spline','poly inter');
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