I have an easy problem but I can't figure it out. I want to create a multiplication table using outer, but I want result to be for example 5x7, instead of 35. I tried:
a <- paste(1:10,collapse="x") b <- 1:10 outer(a,b) but it doesn't work, I guess because my "a" isn't a vector. How can I do it?
Try this:
a <- 1:10 b <- 1:10 outer(a,b,FUN=paste, sep="x" ) Output:
[,1] [,2] [,3] [,4] [,5] [,6] [,7] [,8] [,9] [,10] [1,] "1x1" "1x2" "1x3" "1x4" "1x5" "1x6" "1x7" "1x8" "1x9" "1x10" [2,] "2x1" "2x2" "2x3" "2x4" "2x5" "2x6" "2x7" "2x8" "2x9" "2x10" [3,] "3x1" "3x2" "3x3" "3x4" "3x5" "3x6" "3x7" "3x8" "3x9" "3x10" [4,] "4x1" "4x2" "4x3" "4x4" "4x5" "4x6" "4x7" "4x8" "4x9" "4x10" [5,] "5x1" "5x2" "5x3" "5x4" "5x5" "5x6" "5x7" "5x8" "5x9" "5x10" [6,] "6x1" "6x2" "6x3" "6x4" "6x5" "6x6" "6x7" "6x8" "6x9" "6x10" [7,] "7x1" "7x2" "7x3" "7x4" "7x5" "7x6" "7x7" "7x8" "7x9" "7x10" [8,] "8x1" "8x2" "8x3" "8x4" "8x5" "8x6" "8x7" "8x8" "8x9" "8x10" [9,] "9x1" "9x2" "9x3" "9x4" "9x5" "9x6" "9x7" "9x8" "9x9" "9x10" [10,] "10x1" "10x2" "10x3" "10x4" "10x5" "10x6" "10x7" "10x8" "10x9" "10x10" I guess what you want to do is like below
a <- sprintf("%sx", 1:10) b <- 1:10 outer(a, b, paste0) giving
[,1] [,2] [,3] [,4] [,5] [,6] [,7] [,8] [,9] [,10] [1,] "1x1" "1x2" "1x3" "1x4" "1x5" "1x6" "1x7" "1x8" "1x9" "1x10" [2,] "2x1" "2x2" "2x3" "2x4" "2x5" "2x6" "2x7" "2x8" "2x9" "2x10" [3,] "3x1" "3x2" "3x3" "3x4" "3x5" "3x6" "3x7" "3x8" "3x9" "3x10" [4,] "4x1" "4x2" "4x3" "4x4" "4x5" "4x6" "4x7" "4x8" "4x9" "4x10" [5,] "5x1" "5x2" "5x3" "5x4" "5x5" "5x6" "5x7" "5x8" "5x9" "5x10" [6,] "6x1" "6x2" "6x3" "6x4" "6x5" "6x6" "6x7" "6x8" "6x9" "6x10" [7,] "7x1" "7x2" "7x3" "7x4" "7x5" "7x6" "7x7" "7x8" "7x9" "7x10" [8,] "8x1" "8x2" "8x3" "8x4" "8x5" "8x6" "8x7" "8x8" "8x9" "8x10" [9,] "9x1" "9x2" "9x3" "9x4" "9x5" "9x6" "9x7" "9x8" "9x9" "9x10" [10,] "10x1" "10x2" "10x3" "10x4" "10x5" "10x6" "10x7" "10x8" "10x9" "10x10" 