---
name: "pkfilterascii"
section: "1"
platform: "linux"
package: "pktools"
version: "2.6.7.6+ds-6+b3"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/pkfilterascii"
---

# pkfilterascii(1)

program to filter data in an ASCII file

## NAME

pkfilterascii - program to filter data in an ASCII file

## SYNOPSIS

FC**pkfilterascii**F\[0\]  FC**-i**F\[0\] *input* \[FC**-ic**F\[0\] *column*\] \[*options*\] \[*advanced options*\]

## DESCRIPTION

**pkfilterascii** filters the columns defined by the option FC**-ic**F\[0\]. A varietey of filters can be selected from with the option FC**-f**F\[0\]. The kernel size is defined with the option FC**-dz**F\[0\]. Alternatively, you can define your own filter tap values (use the option FC**-tapz**F\[0\] for each tap). In case of spectral filtering, define the full width half max values (FC**-fwhm**F\[0\] value) or spectral response functions in ASCII files (FC**-srf**F\[0\] filename).

## OPTIONS

- FC**-i**F\[0\] *filename*, FC**--input**F\[0\] *filename*

  input ASCII file

- FC**-o**F\[0\] *filename*, FC**--output**F\[0\] *filename*

  Output ASCII file

- FC**-ic**F\[0\] *column*, FC**--inputCols**F\[0\] *column*

  input columns (e.g., for three dimensional input data in first three columns use: FC**-ic**F\[0\] *0* FC**-ic**F\[0\] *1* FC**-ic**F\[0\] *2*)

- FC**-f**F\[0\] *filter*, FC**--filter**F\[0\] *filter*

  filter function (to be implemented: dwt, dwti,dwt\_cut)

- FC**-dz**F\[0\] *value*, FC**--dz**F\[0\] *value*

  filter kernel size in z (band or spectral dimension), must be odd (example: 3). Set dz\>0 if 1-D filter must be used in band domain

- FC**-t**F\[0\], FC**--transpose**F\[0\]

  transpose output with samples in rows and wavelengths in cols

- FC**-v**F\[0\] *level*, FC**--verbose**F\[0\] *level*

  verbose

Advanced options

- FC**-tapz**F\[0\] *value*, FC**--tapz**F\[0\] *value*

  taps used for spectral filtering

- FC**-fwhm**F\[0\] *value*, FC**--fwhm**F\[0\] *value*

  list of full width half to apply spectral filtering (FC**-fwhm**F\[0\] *band1* FC**-fwhm**F\[0\] *band2* ...)

- FC**-srf**F\[0\] *filename*, FC**--srf**F\[0\] *filename*

  list of ASCII files containing spectral response functions (two columns: wavelength response)

- FC**-win**F\[0\] *col*, FC**--wavelengthIn**F\[0\] *col*

  column number of input ASCII file containing wavelengths

- FC**-wout**F\[0\] *value*, FC**--wavelengthOut**F\[0\] *value*

  list of wavelengths in output spectrum (FC**-wout**F\[0\] *band1* FC**-wout**F\[0\] *band2* ...)

- FC**-interp**F\[0\] *type*, FC**--interp**F\[0\] *type*

  type of interpolation for spectral filtering (see http://www.gnu.org/software/gsl/manual/html\_node/Interpolation-Types.html)

- FC**-wt**F\[0\] *type*, FC**--wavelet**F\[0\] *type*

  wavelet type: daubechies,daubechies\_centered, haar, haar\_centered, bspline, bspline\_centered

- FC**-wf**F\[0\] *family*, FC**--wf**F\[0\] *family*

  wavelet family (vanishing moment, see also http://www.gnu.org/software/gsl/manual/html\_node/DWT-Initialization.html)

- FC**-cut**F\[0\] *threshold*, FC**--cut**F\[0\] *threshold*

  threshold to cut dwt coefficients. Use 0 to keep all.