Ejemplo de combinaciones

Este es un ejemplo de texto.

help("combinations")
# Con repetición
c=combinations(n=4,r=3,v=c('a','b','c','d'),repeats.allowed = T)
c
##       [,1] [,2] [,3]
##  [1,] "a"  "a"  "a" 
##  [2,] "a"  "a"  "b" 
##  [3,] "a"  "a"  "c" 
##  [4,] "a"  "a"  "d" 
##  [5,] "a"  "b"  "b" 
##  [6,] "a"  "b"  "c" 
##  [7,] "a"  "b"  "d" 
##  [8,] "a"  "c"  "c" 
##  [9,] "a"  "c"  "d" 
## [10,] "a"  "d"  "d" 
## [11,] "b"  "b"  "b" 
## [12,] "b"  "b"  "c" 
## [13,] "b"  "b"  "d" 
## [14,] "b"  "c"  "c" 
## [15,] "b"  "c"  "d" 
## [16,] "b"  "d"  "d" 
## [17,] "c"  "c"  "c" 
## [18,] "c"  "c"  "d" 
## [19,] "c"  "d"  "d" 
## [20,] "d"  "d"  "d"
nrow(c)
## [1] 20
# Sin repetición
c=combinations(n=4,r=3,v=c('a','b','c','d'),repeats.allowed = F)
c
##      [,1] [,2] [,3]
## [1,] "a"  "b"  "c" 
## [2,] "a"  "b"  "d" 
## [3,] "a"  "c"  "d" 
## [4,] "b"  "c"  "d"
nrow(c)
## [1] 4
print("holamundo")
## [1] "holamundo"
data("cars")
plot(cars)

Ecuaciones

https://en.wikibooks.org/wiki/LaTeX/Mathematics

\[ A=\sum_{i}^{n}x_i \]