I have implemented this equation in matlab

` In equation`

h[n] = (2/L) cos ( 2 π fb n / fs ), 0≤ n < L

where L is filter length, fb center frequency of the filter (frequency to be filtered), n is number of filter points, and fs is sampling frequency on which filter is implemented.

What we mean by Filter Points (n). Can u kindly explain What is difference between L and n

And i hope that Filter length means order of Filter. Am i right??

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