To create a symmetric filter in MATLAB, we can use the fir1
function. By default, this function will create a linear-phase, symmetric filter.
Here's an example code snippet to create a low-pass filter with a cutoff frequency of 0.2 Hz and length of 101:
main.m252 chars10 lines
In this code, fs
is the sampling frequency, fc
is the cutoff frequency, and N
is the length of the filter kernel. The fir1
function creates a low-pass filter of length N-1
with a cutoff frequency of fc
normalized to the Nyquist frequency (fs/2
). The 'low'
parameter specifies that we want a low-pass filter, and 'symmetric'
specifies that we want a symmetric filter.
Finally, we use the freqz
function to visualize the frequency response of the filter.
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