How do I linearly resample data?
显示 更早的评论
I would like to linearly resample a matrix. For example if A = [0,0;5,10;10,20] I would like to resample it such that B = [0,0;1,2;2,4;3,6;4,8;5,10;6,12;7,14;8,16;9,18;10,20]
B =
0 0
1 2
2 4
3 6
4 8
5 10
6 12
7 14
8 16
9 18
10 20
I originally thought that this is what the resample function did, but upon further analysis I was wrong. Please keep in mind that I am doing this for large sensor files, files which contain data for weeks at 5 minute timesteps.
Thank you for any help
回答（2 个）
Chad Greene
2016-5-4
A = [0,0;5,10;10,20];
B(:,1) = 1:10;
B(:,2) = interp1(A(:,1),A(:,2),B(:,1),'linear')
B =
1.00 2.00
2.00 4.00
3.00 6.00
4.00 8.00
5.00 10.00
6.00 12.00
7.00 14.00
8.00 16.00
9.00 18.00
10.00 20.00
Star Strider
2016-5-4
0 个投票
You can certainly use the resample function. You simply have to create a timeseries object from your data.
See my Answer to your previous Question in: http://www.mathworks.com/matlabcentral/answers/282548-how-can-i-resample-a-set-of-data
3 个评论
Justin Berquist
2016-5-4
Justin Berquist
2016-5-4
Star Strider
2016-5-4
I would have to see your ‘Canal5208RadiatorT_out.csv’ file. If your data are regularly sampled (fixed sampling interval), linearly interpolating it is straightforward, using the linspace function, for instance, to generate the ‘query’ vector. If it’s not regularly-sampled, this becomes more difficult, because four points in every individual interval have to be created.
类别
在 帮助中心 和 File Exchange 中查找有关 Multirate Signal Processing 的更多信息
2016-5-4
2016-5-4
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!
Translated by 
