Argument varorder is not obeyed in mp()

[dkahle]

varorder internally calls reorder.mpoly(), but this is not the expected behavior. varorder, in mpoly(), sets intrinsic variable order, i.e. the order of the variables in then term, not the order of the terms themselves.

library("mpoly")

mp("x y + y x^2")
#> x y  +  x^2 y

mp("x y + y x^2", varorder = c("y", "x"))
#> x^2 y  +  x y

^{Created on 2019-03-18 by the reprex package (v0.2.1)}

[dkahle]

More:

library("mpoly")

str(mp(c("x y^2", "3 y^3 x^2"), varorder = c("x", "y")))
#> List of 2
#>  $ :List of 1
#>   ..$ : Named num [1:3] 1 2 1
#>   .. ..- attr(*, "names")= chr [1:3] "x" "y" "coef"
#>   ..- attr(*, "class")= chr "mpoly"
#>  $ :List of 1
#>   ..$ : Named num [1:3] 3 2 3
#>   .. ..- attr(*, "names")= chr [1:3] "y" "x" "coef"
#>   ..- attr(*, "class")= chr "mpoly"
#>  - attr(*, "class")= chr "mpolyList"

^{Created on 2019-03-19 by the reprex package (v0.2.1)}

[dkahle]

This seems to be due to it not being respected through arithmetic:

library("mpoly")

ms1 <- mp( c("x", 'y') )
ms2 <- mp( c("y", '2 x^2') )
ms1 + ms2
#> x  +  y
#> 2 x^2  +  y

^{Created on 2019-03-20 by the reprex package (v0.2.1)}