How can I extract from a table 1 value each 5 or each 10?

I'm new to matlab, I'd like to know how to extract a value from a table every 5 or 10, and in doing so create a new table 5 times or 10 times smaller.

(I have some measures taken with a rate too high).

Thank you in advance guys!!

Answer 1

[the cyclist]

A = rand(100,1);
A_smaller = A(1:5:end)

If you mean something else than this regular sampling, please a lot more detail (and perhaps a small example) of what you mean.

Answer 2

[Stephen23]

If you are looking at reducing the data set, here are two common options:

• Subsampling
• Interpolation

Here we define some fake data for the examples:

>> A = [1:5;6:10]
A =
     1     2     3     4     5
     6     7     8     9    10

Subsampling in MATLAB is easy using indexing, eg to take every second column of a matrix:

>> A(:,1:2:end)
ans =
     1     3     5
     6     8    10

Interpolation can be achieved using linear, cubic, or spline interpolation, eg:

>> interp1(A.',1.5:4.5).'
ans =
    1.5    2.5    3.5    4.5
    6.5    7.5    8.5    9.5