How to do interpolation?

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

[John Chilleri]

Hello,

Look into the interp1 command. I believe this will do what you wish.

Hope this helps!

[Rita]

Thanks John

Answer 1

[KSSV]

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');

[Rita]

Thanks a lot for your comprehensive answer.