Warning due to R 4.0.0's matrix class

[linnykos]

In R 4.0.0 and newer, the matrix class also now implicitly are also arrays, which cause an unnecessary warning message in clp_solve to trigger. (See, for example: tidymodels/recipes#422) If this could be fixed, that'll be great!

library(clplite)
obj = c(1, 0, 0, 0, 2, 0, 0, -1)
A = matrix(c(
      3,   1,   0,  -2,  -1,   0,    0,   -1,
      0,   2, 1.1,   0,   0,   0,    0,    0,
      0,   0,   1,   0,   0,   1,    0,    0,
      0,   0,   0, 2.8,   0,   0, -1.2,    0,
    5.6,   0,   0,   0,   1,   0,    0,  1.9
), nrow = 5, byrow = TRUE)
constr_lb = c(2.5, -Inf,  4, 1.8,  3)
constr_ub = c(Inf,  2.1,  4,   5, 15)
var_lb    = c(2.5,   0,   0,   0, 0.5,   0,   0,   0)
var_ub    = c(Inf, 4.1, Inf, Inf,   4, Inf, Inf, 4.3)

clp_solve(obj, A, constr_lb, constr_ub, var_lb, var_ub, max = TRUE)

The result I get is as follows:

$solution
[1] 2.5000000 0.0000000 0.0000000 0.6428571 1.0000000 4.0000000
[7] 0.0000000 0.0000000

$objval
[1] 4.5

$status
[1] 0

Warning message:
In if (!(class(A) %in% supported_classes)) { :
  the condition has length > 1 and only the first element will be used

Here is my session info:

> devtools::session_info()
─ Session info ──────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────
 setting  value                       
 version  R version 4.0.3 (2020-10-10)
 os       macOS Big Sur 10.16         
 system   x86_64, darwin17.0          
 ui       RStudio                     
 language (EN)                        
 collate  en_US.UTF-8                 
 ctype    en_US.UTF-8                 
 tz       America/New_York            
 date     2021-01-31                  

─ Packages ──────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────
 package          * version  date       lib source                         
 assertthat         0.2.1    2019-03-21 [1] CRAN (R 4.0.2)                 
 Biobase            2.50.0   2020-10-27 [1] Bioconductor                   
 BiocGenerics       0.36.0   2020-10-27 [1] Bioconductor                   
 BiocParallel       1.24.1   2020-11-06 [1] Bioconductor                   
 bitops             1.0-6    2013-08-17 [1] CRAN (R 4.0.2)                 
 callr              3.5.1    2020-10-13 [1] CRAN (R 4.0.2)                 
 cli                2.2.0    2020-11-20 [1] CRAN (R 4.0.2)                 
 clplite          * 0.1.0    2021-01-06 [1] Github (yixuan/clplite@cffcf11)
 crayon             1.3.4    2017-09-16 [1] CRAN (R 4.0.2)                 
 desc               1.2.0    2018-05-01 [1] CRAN (R 4.0.2)                 
 devtools           2.3.2    2020-09-18 [1] CRAN (R 4.0.2)                 
 digest             0.6.27   2020-10-24 [1] CRAN (R 4.0.2)                 
 ellipsis           0.3.1    2020-05-15 [1] CRAN (R 4.0.2)                 
 fansi              0.4.1    2020-01-08 [1] CRAN (R 4.0.2)                 
 fs                 1.5.0    2020-07-31 [1] CRAN (R 4.0.2)                 
 GenomeInfoDb       1.26.2   2020-12-08 [1] Bioconductor                   
 GenomeInfoDbData   1.2.4    2020-12-14 [1] Bioconductor                   
 GenomicRanges      1.42.0   2020-10-27 [1] Bioconductor                   
 glue               1.4.2    2020-08-27 [1] CRAN (R 4.0.2)                 
 IRanges            2.24.1   2020-12-12 [1] Bioconductor                   
 lattice            0.20-41  2020-04-02 [1] CRAN (R 4.0.3)                 
 lifecycle          0.2.0    2020-03-06 [1] CRAN (R 4.0.2)                 
 magrittr           2.0.1    2020-11-17 [1] CRAN (R 4.0.2)                 
 Matrix             1.3-0    2020-12-22 [1] CRAN (R 4.0.2)                 
 MatrixGenerics     1.2.0    2020-10-27 [1] Bioconductor                   
 matrixStats        0.58.0   2021-01-29 [1] CRAN (R 4.0.2)                 
 memoise            1.1.0    2017-04-21 [1] CRAN (R 4.0.2)                 
 pkgbuild           1.2.0    2020-12-15 [1] CRAN (R 4.0.2)                 
 pkgload            1.1.0    2020-05-29 [1] CRAN (R 4.0.2)                 
 prettyunits        1.1.1    2020-01-24 [1] CRAN (R 4.0.2)                 
 processx           3.4.5    2020-11-30 [1] CRAN (R 4.0.2)                 
 ps                 1.5.0    2020-12-05 [1] CRAN (R 4.0.2)                 
 purrr              0.3.4    2020-04-17 [1] CRAN (R 4.0.2)                 
 R6                 2.5.0    2020-10-28 [1] CRAN (R 4.0.2)                 
 Rcpp               1.0.6    2021-01-15 [1] CRAN (R 4.0.2)                 
 RCurl              1.98-1.2 2020-04-18 [1] CRAN (R 4.0.2)                 
 remotes            2.2.0    2020-07-21 [1] CRAN (R 4.0.2)                 
 rlang              0.4.10   2020-12-30 [1] CRAN (R 4.0.2)                 
 rprojroot          2.0.2    2020-11-15 [1] CRAN (R 4.0.2)                 
 rstudioapi         0.13     2020-11-12 [1] CRAN (R 4.0.2)                 
 S4Vectors          0.28.1   2020-12-09 [1] Bioconductor                   
 sessioninfo        1.1.1    2018-11-05 [1] CRAN (R 4.0.2)                 
 testthat           3.0.1    2020-12-17 [1] CRAN (R 4.0.2)                 
 usethis            2.0.0    2020-12-10 [1] CRAN (R 4.0.2)                 
 withr              2.3.0    2020-09-22 [1] CRAN (R 4.0.2)                 
 XVector            0.30.0   2020-10-28 [1] Bioconductor                   
 zlibbioc           1.36.0   2020-10-28 [1] Bioconductor                   

[1] /Library/Frameworks/R.framework/Versions/4.0/Resources/library