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FIR Filter - "response" function to apply FIR filter
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Offline Propmark  
#1 Posted : 03 November 2019 19:34:37(UTC)
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Hi,
Is there a function to apply a FIR filter to a data vector, like "response" in Mathcad?
I could write my own convolution, but it will become cumbersome at the beginning and end of the vector.

I found the remez function to generate arbitrary pass/stop band combinations, its nice. Are there also the more basic generators for high/low-pass filters somewhere?
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Offline Jean Giraud  
#2 Posted : 04 November 2019 01:34:49(UTC)
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Originally Posted by: Propmark Go to Quoted Post
Is there a function to apply a FIR filter to a data vector, like "response" in Mathcad?
I could write my own convolution, but it will become cumbersome at the beginning and end of the vector.

I found the remez function to generate arbitrary pass/stop band combinations, its nice. Are there also the more basic generators for high/low-pass filters somewhere?

You can map 2D, 3D to any math function.
Why not show something. Filter is too general
Filter/smooth ... Filter band ...

0Appendix Pulse train.sm (7kb) downloaded 23 time(s).
Convolution Numerical [Pulse model].sm (25kb) downloaded 26 time(s).
0Appendix Gaussian Convolution.sm (22kb) downloaded 21 time(s).
0Appendix_2 Toise Bidirectional.sm (37kb) downloaded 19 time(s).
Convol.sm (94kb) downloaded 20 time(s).
Maths Filter EQMF.sm (31kb) downloaded 25 time(s).
Maths Filter Igor.sm (41kb) downloaded 23 time(s).
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Offline Jean Giraud  
#3 Posted : 04 November 2019 15:23:21(UTC)
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Originally Posted by: Propmark Go to Quoted Post
Is there a function to apply a FIR filter to a data vector, like "response" in Mathcad
?

I don't think much of the Mathcad response 20 years old maybe.
In those days, they fight imitating analog filters.
Attach your signal data, what you want to do.

signal.PNG

Maths Filter response.sm (19kb) downloaded 29 time(s).
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Offline Razonar  
#4 Posted : 05 November 2019 17:25:42(UTC)
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Hi. This function emulates the matlab filter function (https://uk.mathworks.com/help/matlab/ref/filter.html) Hope it's helps.

filter.sm (35kb) downloaded 39 time(s).

Best regards.
Alvaro.
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thanks 1 user thanked Razonar for this useful post.
on 05/11/2019(UTC)
Offline Jean Giraud  
#5 Posted : 06 November 2019 00:15:55(UTC)
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... lot more smoothing in there.

filter.sm (50kb) downloaded 28 time(s).
Fourier Budapest39 Smoothing_2.sm (47kb) downloaded 19 time(s).
Fourier DCT-II [Data].sm (143kb) downloaded 22 time(s).
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