R Under development (unstable) (2023-12-12 r85669 ucrt) -- "Unsuffered Consequences"
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> ## rmatio, a R interface to the C library matio, MAT File I/O Library.
> ## Copyright (C) 2013-2023  Stefan Widgren
> ##
> ## This program is free software: you can redistribute it and/or modify
> ## it under the terms of the GNU General Public License as published by
> ## the Free Software Foundation, either version 3 of the License, or
> ## (at your option) any later version.
> ##
> ## rmatio is distributed in the hope that it will be useful,
> ## but WITHOUT ANY WARRANTY; without even the implied warranty of
> ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
> ## GNU General Public License for more details.
> ##
> ## You should have received a copy of the GNU General Public License
> ## along with this program.  If not, see <http://www.gnu.org/licenses/>.
> 
> library(rmatio)
> 
> ## For debugging
> sessionInfo()
R Under development (unstable) (2023-12-12 r85669 ucrt)
Platform: x86_64-w64-mingw32/x64
Running under: Windows Server 2022 x64 (build 20348)

Matrix products: default


locale:
[1] LC_COLLATE=C                 LC_CTYPE=German_Germany.utf8
[3] LC_MONETARY=C                LC_NUMERIC=C                
[5] LC_TIME=C                   

time zone: Europe/Berlin
tzcode source: internal

attached base packages:
[1] stats     graphics  grDevices utils     datasets  methods   base     

other attached packages:
[1] rmatio_0.19.0

loaded via a namespace (and not attached):
[1] compiler_4.4.0 Matrix_1.6-4   grid_4.4.0     lattice_0.22-5
> 
> ##
> ## Check write and read of matrix in MAT5 format:
> ## 1) without compression
> ## 2) with compression
> ##
> 
> ##
> ## matrix: case-1
> ##
> a1_exp <- matrix(1:9, nrow = 3)
> filename <- tempfile(fileext = ".mat")
> write.mat(list(a = a1_exp), filename = filename, compression = FALSE,
+           version = "MAT5")
> a1_obs <- read.mat(filename)[["a"]]
> unlink(filename)
> storage.mode(a1_obs) <- "integer"
> str(a1_obs)
 int [1:3, 1:3] 1 2 3 4 5 6 7 8 9
> stopifnot(identical(a1_obs, a1_exp))
> 
> ## Run the same test with compression
> filename <- tempfile(fileext = ".mat")
> write.mat(list(a = a1_exp), filename = filename, compression = TRUE,
+           version = "MAT5")
> a1_zlib_obs <- read.mat(filename)[["a"]]
> unlink(filename)
> storage.mode(a1_zlib_obs) <- "integer"
> str(a1_zlib_obs)
 int [1:3, 1:3] 1 2 3 4 5 6 7 8 9
> stopifnot(identical(a1_zlib_obs, a1_exp))
> 
> ##
> ## matrix: case-2
> ##
> a2_exp <- matrix(c(1, 2, 3, 4, 5, 6, 7, 8, 9), nrow = 3)
> filename <- tempfile(fileext = ".mat")
> write.mat(list(a = a2_exp), filename = filename, compression = FALSE,
+           version = "MAT5")
> a2_obs <- read.mat(filename)[["a"]]
> unlink(filename)
> str(a2_obs)
 num [1:3, 1:3] 1 2 3 4 5 6 7 8 9
> stopifnot(identical(a2_obs, a2_exp))
> 
> ## Run the same test with compression
> filename <- tempfile(fileext = ".mat")
> write.mat(list(a = a2_exp), filename = filename, compression = TRUE,
+           version = "MAT5")
> a2_zlib_obs <- read.mat(filename)[["a"]]
> unlink(filename)
> str(a2_zlib_obs)
 num [1:3, 1:3] 1 2 3 4 5 6 7 8 9
> stopifnot(identical(a2_zlib_obs, a2_exp))
> 
> proc.time()
   user  system elapsed 
   0.92    0.09    1.00