清空筛选条件
清空筛选条件

How can I increase my dataset length by Interpolation?

28 次查看（过去 30 天）
Sahil Patel
Sahil Patel 2020-5-5
评论： Ameer Hamza 2020-5-5
I want to increase my data set length from say 5571x1 to 5590x1 by interpolating it non linearly since this dataset is experimental and there is no fixed interval.
All i've experimented with is using 'interp' and 'interp1' but no luck so far.

请先登录，再回答此问题。

采纳的回答

Ameer Hamza
Ameer Hamza 2020-5-5
This is a simple example which interpolates the data using cubic interpolation
x = rand(5571, 1); % your signal
t = linspace(0, 1, numel(x));
n = 5590; % required length
t_ = linspace(0, 1, n);
x_ = interp1(t, x, t_, 'spline').'; % x_ has dimensions of 5590x1
  2 个评论
Sahil Patel
Sahil Patel 2020-5-5
Thank you! This helped, although 'spline' changed my signal data a bit. Is there a way to interpolate in such a way that existing data isnt changed?
Ameer Hamza
Ameer Hamza 2020-5-5
You can try 'linear', 'pchip', or 'makima' in place of spline and see which fits your requirement.

请先登录，再进行评论。

更多回答（0 个）

类别

在 Help Center 和 File Exchange 中查找有关 Interpolation 的更多信息

标签

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by