R Under development (unstable) (2023-11-07 r85491 ucrt) -- "Unsuffered Consequences"
Copyright (C) 2023 The R Foundation for Statistical Computing
Platform: x86_64-w64-mingw32/x64

R is free software and comes with ABSOLUTELY NO WARRANTY.
You are welcome to redistribute it under certain conditions.
Type 'license()' or 'licence()' for distribution details.

R is a collaborative project with many contributors.
Type 'contributors()' for more information and
'citation()' on how to cite R or R packages in publications.

Type 'demo()' for some demos, 'help()' for on-line help, or
'help.start()' for an HTML browser interface to help.
Type 'q()' to quit R.

> ##
> ##  c o  n v . r  Test suite
> ##
> 
> 
> conv <- pracma::conv
> deconv <- pracma::deconv
> 
> all.equal(conv(c(1, 1, 1), 1), c(1, 1, 1))
[1] TRUE
> all.equal(conv(c(1, 1, 1), c(0, 0, 1)), c(0, 0, 1, 1, 1))
[1] TRUE
> all.equal(conv(c(-0.5, 1, -1), c(0.5, 0, 1)), c(-0.25, 0.5, -1, 1, -1))
[1] TRUE
> 
> b <- c(-0.25, 0.5, -1, 1, -1)
> a <- c(0.5, 0, 1)
> d <- deconv(b, a)
> all.equal(d$q, c(-0.5, 1, -1))
[1] TRUE
> all.equal(d$r, c(0, 0))
[1] TRUE
> 
> proc.time()
   user  system elapsed 
   0.17    0.06    0.17