How to interpolate a matrix ?

Hello everyone.I have a question about an matrix.I want to a interpolation in M(10X2 double)' datas.And I want to obtain the N(9X2) matrix.Here you can see the example

time step variables time step variables

M=[ 3.2 5 N= [4 ...?

4.1 4 5 ...?

5.6 3 6 ...?

6.7 2 7 ...?

7.5 1 8 ...?

8.4 3 9 ...?

9.3 2 10 ...?

10.5 5 11 ...?

11.4 2 12 ...?]

12 6]

Thanks for your answer !!!

Answer 1

[Star Strider]

Try this —

M=[ 3.2                    5
    4.1                    4
    5.6                    3 
    6.7                    2
    7.5                    1
    8.4                    3
    9.3                    2
    10.5                   5
    11.4                   2
    12                     6]

M = 10×2

3.2000 5.0000 4.1000 4.0000 5.6000 3.0000 6.7000 2.0000 7.5000 1.0000 8.4000 3.0000 9.3000 2.0000 10.5000 5.0000 11.4000 2.0000 12.0000 6.0000

N = [4; 5; 6; 7; 8; 9; 10; 11; 12];

N2 = interp1(M(:,1),M(:,2),N)

N2 = 9×1

4.1111 3.4000 2.6364 1.6250 2.1111 2.3333 3.7500 3.3333 6.0000

N = [N N2]

N = 9×2

4.0000 4.1111 5.0000 3.4000 6.0000 2.6364 7.0000 1.6250 8.0000 2.1111 9.0000 2.3333 10.0000 3.7500 11.0000 3.3333 12.0000 6.0000

See the documentation for interp1 for details.

.

[Omer Utku Altindag]

Thank you so much,but I have a 3015X1 matrix.When ı this situation how can I define N sir ? I forgot to put this situation.Sorry :/

[Star Strider]

My pleasure!

I created ‘N’ using the original ‘N(:,1)’ as the first column, and the interpolated values as the (second) ‘N(:,2)’ column, as described in the original post.

Do the same with your (3015x1) vector.

[Omer Utku Altindag]

Thank you so much!

[Star Strider]

As always, my pleasure!