Decimate to a specific number
조회 수: 12 (최근 30일)
이전 댓글 표시
Hi,
I have a signal and I would like to downsample it at a specific number (e.g. 256). I am thinking to use the function decimate(), anyway, it accepts only the integers as input. So, I cannot downsample my signal to a specific value.
The code:
myArray = 1:980;
target = 256;
[p,q] = rat(256/length(myArray));
y = decimate(myArray,p/q);
My first idea is to interpolate the data in order to reach a multiple of my target sample rate. Anyway, maybe there is a different (and better) solution.
NB: I know that there is the function resample(), anyway I am trying to find new solutions.
Regards
댓글 수: 0
답변 (1개)
Walter Roberson
2017년 4월 22일
myArray = 1:980;
target = 256;
n_ent = length(myArray);
y = interp1( 1:n_ent, myArray, linspace(1, n_ent, target) );
You cannot use decimate() the way you had hoped to.
댓글 수: 0
참고 항목
카테고리
Help Center 및 File Exchange에서 Multirate Signal Processing에 대해 자세히 알아보기
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!