Это то, что вам нужно?
library(tidyverse)
stack(x) %>%
separate(ind, c("x", "y"), sep = "-") %>%
mutate(
x = factor(x, levels = sort(union(x, y))),
y = factor(y, levels = sort(union(x, y)))) %>%
complete(x, y) %>%
spread(y, values)
## A tibble: 14 x 15
# x a b c d e f g
# <fct> <dbl> <dbl> <dbl> <dbl> <dbl> <dbl> <dbl>
# 1 a NA NA NA NA NA NA NA
# 2 b 1.33e-1 NA NA NA NA NA NA
# 3 c 10.00e-1 6.49e-2 NA NA NA NA NA
# 4 d 8.02e-1 2.75e-3 9.99e-1 NA NA NA NA
# 5 e 1.00e+0 2.17e-1 10.00e-1 8.94e-1 NA NA NA
# 6 f 10.00e-1 5.64e-2 10.00e-1 9.27e-1 10.00e-1 NA NA
# 7 g 10.00e-1 8.30e-1 9.95e-1 6.79e-1 10.00e-1 10.00e-1 NA
# 8 h 2.11e-1 1.37e-5 9.96e-1 1.00e+0 5.32e-1 4.65e-1 0.342
# 9 i 1.90e-6 2.92e-1 2.13e-6 2.48e-8 1.03e-5 4.11e-7 0.00156
#10 j 9.73e-1 2.03e-3 10.00e-1 10.00e-1 9.95e-1 9.99e-1 0.914
#11 k 10.00e-1 4.30e-1 9.98e-1 6.97e-1 10.00e-1 10.00e-1 1.000
#12 m 10.00e-1 8.94e-1 10.00e-1 9.58e-1 10.00e-1 10.00e-1 1.000
#13 n 1.77e-3 1.26e-7 1.59e-1 8.24e-1 8.28e-3 5.32e-3 0.00551
#14 p 7.39e-1 1.48e-2 9.81e-1 10.00e-1 8.01e-1 8.49e-1 0.590
## ... with 7 more variables: h <dbl>, i <dbl>, j <dbl>, k <dbl>, m <dbl>,
## n <dbl>, p <dbl>
Обратите внимание, что это заполняет только нижнюю треугольную часть матрицы.Просто скопировать значения в верхнюю треугольную часть.
Пример данных
x <- c("b-a" = 0.132736594352255,"c-a" = 0.999921265128142,
"d-a" = 0.801948385014406,"e-a" = 1,"f-a" = 0.999999993422497,
"g-a" = 0.999994493135286,"h-a" = 0.210958663031597,
"i-a" = 1.8980767408916e-06,"j-a" = 0.973055228316854,
"k-a" = 0.999999989980955,"m-a" = 0.999999999847843,
"n-a" = 0.00176609502582648,"p-a" = 0.738916850855589,
"c-b" = 0.0648789689498736,"d-b" = 0.00274896267890112,
"e-b" = 0.217149424299426,"f-b" = 0.0563761493313133,
"g-b" = 0.830288996389741,"h-b" = 1.37129030743921e-05,
"i-b" = 0.292237803866045,"j-b" = 0.00203363512911592,
"k-b" = 0.429789314314218,"m-b" = 0.893873188901534,
"n-b" = 1.26129400479513e-07,"p-b" = 0.0148404046180679,
"d-c" = 0.999413140979136,"e-c" = 0.999983194608954,
"f-c" = 0.999999593776059,"g-c" = 0.99450256286738,
"h-c" = 0.995948206958786,"i-c" = 2.12711732894277e-06,
"j-c" = 0.999999999953707,"k-c" = 0.99849672006282,
"m-c" = 0.999945483624277,"n-c" = 0.159133209452148,
"p-c" = 0.981199963747256,"e-d" = 0.894189247372541,
"f-d" = 0.927465343408835,"g-d" = 0.679255997014174,
"h-d" = 1,"i-d" = 2.48392421076105e-08,"j-d" = 0.999592315002344,
"k-d" = 0.697136248874886,"m-d" = 0.958196387101045,
"n-d" = 0.823800464142429,"p-d" = 0.999990479586194,
"f-e" = 0.999999999789834,"g-e" = 0.999995787557262,
"h-e" = 0.53201292841468,"i-e" = 1.03081411517714e-05,
"j-e" = 0.995077423573089,"k-e" = 0.999999990349601,
"m-e" = 0.999999999728218,"n-e" = 0.00827803916192571,
"p-e" = 0.801239862126994,"g-f" = 0.999679361401266,
"h-f" = 0.464857165472924,"i-f" = 4.11179760018143e-07,
"j-f" = 0.998610646241627,"k-f" = 0.999980920365226,
"m-f" = 0.999999813932987,"n-f" = 0.00531987647573118,
"p-f" = 0.848849590006324,"h-g" = 0.341590849630092,
"i-g" = 0.00156077688059131,"j-g" = 0.914056068033521,
"k-g" = 0.999999999582086,"m-g" = 0.999999999998442,
"n-g" = 0.00550711110598001,"p-g" = 0.589694361848451,
"i-h" = 1.32359012638972e-10,"j-h" = 0.981457563281897,
"k-h" = 0.217452285021171,"m-h" = 0.909323296631876,"n-h" = 0.329509866222374,
"p-h" = 0.999896413565643,"j-i" = 2.4844853951933e-09,
"k-i" = 4.94704403456447e-05,"m-i" = 0.0101526672020547,
"n-i" = 1.28862254200612e-10,"p-i" = 3.63259988322984e-06,
"k-j" = 0.923957489008565,"m-j" = 0.998615227094082,
"n-j" = 0.0479071931248186,"p-j" = 0.983802108362677,
"m-k" = 1,"n-k" = 0.00201102356142246,"p-k" = 0.638580957139582,
"n-m" = 0.121254171582127,"p-m" = 0.857057426831322,
"p-n" = 0.999990553111872)