Как получить разрешение DoE {DoE.base}?

Question

Для создания эксперимента я использую frf2 :

На самом деле я использую два проекта:

design.info(experiment)
$type
[1] "FrF2"

$nruns
[1] 32

$nfactors
[1] 6

$factor.names
$factor.names$T
[1] "low"  "high"

$factor.names$rH
[1] "low"  "high"

$factor.names$p
[1] "low"  "high"

$factor.names$H2
[1] "low"  "high"

$factor.names$CO
[1] "low"  "high"

$factor.names$C2H4
[1] "low"  "high"


$catlg.name
[1] "catlg"

$catlg.entry
Design:  6-1.1 
   32  runs,  6  factors,  
   Resolution  VI 
   Generating columns:  31 
   WLP (3plus):  0 0 0 1 0 ,  15  clear 2fis

$aliased
$aliased$legend
[1] "A=T"    "B=rH"   "C=p"    "D=H2"   "E=CO"   "F=C2H4"

$aliased[[2]]
[1] "no aliasing among main effects and 2fis"


$FrF2.version
[1] "2.1"

$replications
[1] 1

$repeat.only
[1] FALSE

$randomize
[1] TRUE

$seed
NULL

$creator
FrF2(nruns = NULL, nfactors = 6, factor.names = c("T", 
    "rH", "p", "H2", "CO", "C2H4"), 
    default.levels = c("low", "high"), resolution = 6, 
    randomize = TRUE)

и, например,

design.info(experiment)
$type
[1] "FrF2.splitplot"

$nruns
[1] 16

$nfactors
[1] 6

$nfac.WP
[1] 2

$nfac.SP
[1] 4

$factor.names
$factor.names$T
[1] "low"  "high"

$factor.names$rH
[1] "low"  "high"

$factor.names$p
[1] "low"  "high"

$factor.names$H2
[1] "low"  "high"

$factor.names$CO
[1] "low"  "high"

$factor.names$C2H4
[1] "low"  "high"


$nWPs
[1] 4

$plotsize
[1] 4

$res.WP
[1] Inf

$aliased
$aliased$legend
[1] "A=T"    "B=rH"   "C=p"    "D=H2"   "E=CO"   "F=C2H4"

$aliased$main
character(0)

$aliased$fi2
[1] "AB=CE=DF" "AC=BE"    "AD=BF"    "AE=BC"    "AF=BD"    "CD=EF"    "CF=DE"   


$FrF2.version
[1] "2.1"

$catlg.name
[1] "catlg"

$base.design
[1] "6-2.1"

$map
[1] 1 2 3 4

$orig.fac.order
[1] 1 2 3 4 5 6

$replications
[1] 1

$repeat.only
[1] FALSE

$randomize
[1] TRUE

$seed
NULL

$creator
FrF2(nruns = NULL, nfactors = 6, factor.names = c("T", 
    "rH", "p", "H2", "CO", "C2H4"), 
    default.levels = c("low", "high"), WPs = 4, nfac.WP = 2, 
    WPfacs = c("T", "rH"), design = "6-2.1", 
    randomize = TRUE)

Как вы, вероятно, видите, в верхнем дизайне дано разрешение, но не в нижнем. Но я хотел бы знать разрешение нижнего. Как мне получить разрешение? Я не смог найти ни одной команды в пакете.