Generate all Combinations of xCm in R Programming – combn() Function
combn()
function in R Language is used to generate all combinations of the elements of x taken m at a time.
Syntax: combn(x, m)
Parameters:
x: total number of elements taken
r: number of elements taken at a time out of “x” elements
Example 1:
# R program to illustrate # combn function # Calling the combn() function combn( 5 , 3 ) combn( 6 , 5 ) combn( 2 , 2 ) |
Output:
[, 1] [, 2] [, 3] [, 4] [, 5] [, 6] [, 7] [, 8] [, 9] [, 10] [1, ] 1 1 1 1 1 1 2 2 2 3 [2, ] 2 2 2 3 3 4 3 3 4 4 [3, ] 3 4 5 4 5 5 4 5 5 5 [, 1] [, 2] [, 3] [, 4] [, 5] [, 6] [1, ] 1 1 1 1 1 2 [2, ] 2 2 2 2 3 3 [3, ] 3 3 3 4 4 4 [4, ] 4 4 5 5 5 5 [5, ] 5 6 6 6 6 6 [, 1] [1, ] 1 [2, ] 2
Example 2:
# R program to illustrate # combn function # Calling the combn() function combn(LETTERS[ 1 : 4 ], 2 ) combn(LETTERS[ 2 : 6 ], 3 ) |
Output:
[, 1] [, 2] [, 3] [, 4] [, 5] [, 6] [1, ] "A" "A" "A" "B" "B" "C" [2, ] "B" "C" "D" "C" "D" "D" [, 1] [, 2] [, 3] [, 4] [, 5] [, 6] [, 7] [, 8] [, 9] [, 10] [1, ] "B" "B" "B" "B" "B" "B" "C" "C" "C" "D" [2, ] "C" "C" "C" "D" "D" "E" "D" "D" "E" "E" [3, ] "D" "E" "F" "E" "F" "F" "E" "F" "F" "F"
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