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Rita
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How to do interpolation?

Asked by Rita
on 24 Apr 2017
Latest activity Commented on by Rita
on 25 Apr 2017
Accepted Answer by KSSV
I have a vector which has daily measured data for some days of a year.for example I have
A=[ 1 1
4 3
7 6
75 0
245 4
300 1
350 0
365 6]
the first column is the day of year and the second column is the measured data.I want to interpolate the second column for the other days of the year.Any suggestion?Thanks

  2 Comments

Hello,
Look into the interp1 command. I believe this will do what you wish.
Hope this helps!
Thanks John

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1 Answer

Answer by KSSV
on 25 Apr 2017
 Accepted Answer

A=[ 1 1
4 3
7 6
75 0
245 4
300 1
350 0
365 6] ;
t = A(:,1) ; a = A(:,1) ;
ti = 1:365 ;
ai = interp1(t,a,ti) ;
plot(t,a,'.r') ;
hold on
plot(ti,ai,'b') ;
xlabel('days')
ylabel('value')
legend('Given data', 'interpolated');

  1 Comment

Thanks a lot for your comprehensive answer.

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