Interpolation between 2 discret point

Hi,

I looking for the command or a function that performan interpolation between 2 discrete point, with a polynom i defin

In fact i have a timeseries which i want to interpolate with a cubic polynom @ 0.5ms

I found the interp1 command , but i can not set the interpolation cubic coefficient polynom i want

Thanks for your reply

[Torsten]

Why a cubic for two points ? You need 4 points to uniquely fix the cubic.

Answer 1

[baptiste giroud]

I fact i receive a position each 10ms , its a discret signal

What i want to perform its between 2 points ,having a continious signal coming from a cubic interpolation.

I have the coefficient of the cubic polynome

[Bruno Luong]

If you have coefficients then simply evaluate it using POLYVAL.

This is no longer an interpolation problem (which has the step of finding the coefficients so that the polynomial goes through the point values, but in yur case you already have the coefficients).