NEWS.md
In gsignal: Signal Processing

gsignal 0.3-5

date: 20220514
Fixed Github Discussion #6: remove padding to nearest power of 2 in pwelch()
Fixed Github Issue #5: returning matrix when input is matrix in pwelch()
Adapted e-mail addresses in mexihat, morlet, nutallwin, pburg, pyulear
use inherits() instead of direct comparison of class name in ar_psd, findpeaks, pwelch, sgolayfilt, upfirdn
defined plot methods for ar_psd, pwelch, specgram classes
Fixed Github Issue #7: decimate with a matrix;, added "fir" argument to ftype

gsignal 0.3-4

date: 20220404
Fixed test failure in tests/testthat/test_miscellaneous_Functions.R

gsignal 0.3-3

date: 20220330
Fixed Github Issue #3: Problems with fftfilt when FFT length is provided by user
copy attributes of input object x to output in functions filter, filtfilt, sosfilt, fftfilt
copy dimnames of input object x to output in functions upfirdn, resample, upsample, upsamplefill, downsample, decimate, detrend, fht, sgolayfilt,
added ultrwin() function
adapted filter() to allow data and filter coefficients to be of type complex
adapted sosfilt() to allow data and filter coefficients to be of type complex
bugfix in pwelch() for multivariate input
Fixed Github Issue #4: Problem with hilbert for small amplitude signals
added isConjSymm() function to gsignal-internal
adapted ifft() to use isConjSymm instead of ZapIm
reduced default tolerance for isWhole() and zapIm()
bugfix in detrend(): function now returns a vector if input was a vector
bugfix in filtfilt(): corrected bug in computing filter ends (default and Sos methods)

gsignal 0.3-2

date: 20210518
corrected CRAN WARNINGs on ATLAS, MKL, valgrind, fedora, solaris
corrected import NOTE for grDevices
adapted code in vignette "gsignal"
use explicit tolerance in testthat tests
added badges and logo (just for the fun of it)
sort zeros and poles on output in sos2zp(), tf2zp()
use matrix() instead of as.matrix() in functions dct(), idct(), czt(), dst(), idst(), fht(), ifht()
minor bugfix in arburg()
bugfix in filter.cpp: resize a and b vectors, length of zi
adapted some examples

gsignal 0.3-1

date: 20210502
added 'signals' data frame
cleaned code
minor bugfixes
updated tests
added vignette

gsignal 0.3-0

date: 20210411
Bugfixes in pwelch(), butter(), as.Arma.Sos(), as.Sos.Zpg(), sos2tf()
Added 'output' parameter to butter(), cheby1(), cheby2(), ellip()
Redesigned filter() to correct problems with initial conditions (now direct-form II)
Return objects of respective class tf2zp(), tf2sos(), zp2sos(), zp2tf(), sos2tf(), sos2zp()
Added 'order' argument to zp2sos(); changed default ordering
Added filter_zi() function
Redesigned sosfilt(); added support for initial conditions
Adapted filtfilt(): use padding and Gustafsson method for initial conditions
Function sgolayfilt(): if input x is a matrix, filter its columns
Replace 'dim' argument by 'MARGIN' in functions cplxpair(), cplxpair(), medfilt1()
Solved numerical precision error in chebwin() and cheb() functions
Bugfix in cplxpair(); added additional tests
Return vector if input is a vector in function czt()
Added range parameter ('half' or 'whole') in function pwelch()
Bugfix in calculating time points, function stft()
Changed plotting to S3 functions in function specgram()

gsignal 0.2-0

date: 20201218
completed documentation
adapted examples and links
license changed to GPL-3 in accordance with Octave signal package license

gsignal 0.1-0

date: 20201213
initial setup. Functions:
Signals: buffer, chirp, cmorwavf, diric, gauspuls, gmonopuls, mexihat, meyeraux, morlet, pulstran, rectpuls, sawtooth, shanwavf, shiftdata, sigmoid_train, sinetone, sinewave, specgram, square, tripuls, udecode, uencode, unshiftdata
Signal Measurement: findpeaks, peak2peak, peak2rms, rms, rssq
Correlation and Convolution: cconv, convmtx, wconv, xcorr, xcorr2, xcov
Filtering: fftfilt, filter, filter2, filtfilt, filtic, medfilt1, movingrms, sgolayfilt, sosfilt
Filter Analysis: freqs, freqs_plot, freqz, freqz_plot, fwhm, grpdelay, impz, zplane
Filter Conversion: polystab, residued, residuez, sos2tf, sos2zp, tf2sos, tf2zp, zp2sos, zp2tf
IIR Filter Design: besselap, besself, bilinear, buttap, butter, buttord, cheb, cheb1ap, cheb1ord, cheb2ap, cheb2ord, cheby1, cheby2 ellip, ellipap, ellipord, iirlp2mb, impinvar, invimpinvar, ncauer, pei_tseng_notch, sftrans
FIR Filter Design: cl2bp, fir1, fir2, firls, kaiserord, qp_kaiser, remez, sgolay
Transforms: bitrevorder, cceps, cplxreal, czt, dct, dct2, dctmtx, dftmtx, digitrevorder, dst, dwt, fftshift, fht, fwht, hilbert, idct, idct2, idst, ifft, ifftshift, ifht, ifwht, imvfft, rceps, stft
Power Spectrum Analysis: ar_psd, cohere, cpsd, csd, db2pow, mscohere, pburg, pow2db, pwelch, pyulear, tfe, tfestimate
Window Functions: barthannwin, bartlett, blackman, blackmanharris, blackmannuttall, bohmanwin, boxcar, chebwin, flattopwin, gaussian, gausswin, hamming, hanning, hann, kaiser, nuttallwin, parzenwin, rectwin, triang, tukeywin, ultrwin, welchwin
System Identification: arburg, aryule, invfreq, invfreqs, invfreqz, levinson
Sample Rate Change: decimate, downsample, interp, resample, upfirdn, upsample
Utility: clustersegment, fracshift, marcumq, primitive, sampled2continuous, schtrig, upsamplefill, wkeep, zerocrossing
Standard Functions: detrend, pad, postpad, prepad
Miscellaneous: Arma, Ma, Zpg, Sos, FilterSpecs, fftconv, unwrap, cplxpair, poly, conv, conv2, residue, polyreduce, mpoles