查看 filter 函数.

Look at the filter function.

如果您只需要一个 1 极点低通滤波器，那就是

If you just need a 1-pole low-pass filter, it's

xfilt = filter(a, [1 a-1], x);

其中 a = T/τ，T = 样本之间的时间，并且 τ(tau) 是过滤时间常数.

where a = T/τ, T = the time between samples, and τ (tau) is the filter time constant.

这是相应的高通滤波器:

Here's the corresponding high-pass filter:

xfilt = filter([1-a a-1],[1 a-1], x);

如果您需要设计滤波器并拥有信号处理工具箱的许可证，请访问 一堆函数，看fvtool 和 fdatool.

If you need to design a filter, and have a license for the Signal Processing Toolbox, there's a bunch of functions, look at fvtool and fdatool.