Spline interpolation is giving me errors with array index

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Nassim Zahrir
Nassim Zahrir 2019-4-2
回答： Akira Agata 2019-4-3
Here is my code:
t = linspace(0,2*pi,8)';
f = sin(t).^2 ;
xx = linspace(0,2*pi);
yy = spline(t,f,xx);
and
Here is the error it is giving me:
Index in position 1 is invalid. Array
indices must be positive integers or
logical values.
Error in (line 4)
yy = spline(t,f,xx);

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回答（1 个）

Akira Agata
Akira Agata 2019-4-3
At least the latest version R2019a, your code works well.
Anyway, I would recommend adjusting vector direction of t and xx, like:
t = linspace(0,2*pi,8)'; % Column vector
f = sin(t).^2 ;
xx = linspace(0,2*pi)'; % Column vector
yy = spline(t,f,xx);

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