Many hyperlinks are disabled.
Use anonymous login
to enable hyperlinks.
Overview
| Comment: | Correct mistakes in the man page for the filter package. |
|---|---|
| Downloads: | Tarball | ZIP archive |
| Timelines: | family | ancestors | descendants | both | trunk | main |
| Files: | files | file ages | folders |
| SHA3-256: |
ce253d70e31f8b0d0f826ca9f7367281 |
| User & Date: | arjenmarkus 2025-01-04 18:37:28.736 |
Context
|
2025-01-15
| ||
| 19:49 | fix: ticket b01462dff7, integrated from branch. version bumped. testsuite extended. doc regenerated. check-in: 870b1002a4 user: aku tags: trunk, main | |
|
2025-01-10
| ||
| 13:55 | Proposed fix for tar::untar bug [b01462dff7] check-in: cef77068e4 user: apnadkarni tags: bug-b01462dff7 | |
|
2025-01-04
| ||
| 18:37 | Correct mistakes in the man page for the filter package. check-in: ce253d70e3 user: arjenmarkus tags: trunk, main | |
| 16:16 | Re-implement the filter procedures, this time based on source code with an MIT license check-in: 79ae95d9e3 user: arjenmarkus tags: trunk, main | |
Changes
Changes to modules/math/filtergen.man.
| ︙ | ︙ | |||
14 15 16 17 18 19 20 | [description] [para] The [package math::filters] package implements digital filters, notably Butterworth and Chebyshev low-pass and high-pass filters. The procedures allow to filter an entire data series as well as filter data one by one. | | | 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 | [description] [para] The [package math::filters] package implements digital filters, notably Butterworth and Chebyshev low-pass and high-pass filters. The procedures allow to filter an entire data series as well as filter data one by one. Note: [uri https://en.wikipedia.org/wiki/Digital_filter] and other pages on Wikipedia describe the principles and design considerations of these digital filters. Note: This is a reimplementation compared to version 0.3, which was based on GPL-licensed code. One possible incompatibility with that version is that the order now needs to be even. [section "PROCEDURES"] |
| ︙ | ︙ | |||
50 51 52 53 54 55 56 | [list_begin arguments] [arg_def list coeffs] List of coefficients as generated by [emph filterButterworth] (or in fact any similar list of coefficients) [arg_def list data] Data to be filtered [list_end] | | | | 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 | [list_begin arguments] [arg_def list coeffs] List of coefficients as generated by [emph filterButterworth] (or in fact any similar list of coefficients) [arg_def list data] Data to be filtered [list_end] [call [cmd ::math::filters::filterChebyshev] [arg lowpass] [arg order] [arg samplefreq] [arg cutofffreq] [opt [arg epsilon]]] Determine the coefficients for a Chebyshev filter of given (even) order. The coefficients are returned as a nested list, suitable for the [term filter] command or method, For this type of filters an extra parameter can be given, the so-called ripple factor. This controls the smoothness of the gain factor. [list_begin arguments] [arg_def bool lowpass] Generate a low-pass filter (1) or a high-pass filter (0) [arg_def integer order] The order of the filter to be generated - it must be even [arg_def double samplefreq] Sampling frequency of the data series [arg_def double cutofffreq] Cut-off frequency for the filter (must be less than half the sampling frequency) [arg_def double epsilon] Ripple factor, defaults to 0.1 [list_end] [call [cmd ::math::filters::filter] [arg coeffs] [arg data]] Filter the entire data series based on the filter coefficients. |
| ︙ | ︙ |