Matrix

Challenge Overview

Given a string representing a matrix of numbers, return the rows and columns of that matrix.

Visit the matrix exercise on Exercism to read the full instructions and download the exercise files.

Community Solutions

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The following are the top 3 community solutions by stars:

Solution 1 by @Steffan153 (⭐ 0) — View on Exercism
Solution 2 by @YanniPapandreou (⭐ 0) — View on Exercism
Solution 3 by @liuq901 (⭐ 0) — View on Exercism

Source: Exercism r/matrix

💡 View Solution

matrix_row <- function(input, row_idx) {
  as.numeric(strsplit(strsplit(input, '\n')[[1]][row_idx], ' ')[[1]])
}

matrix_col <- function(input, col_idx) {
  as.numeric(Map(\(x) strsplit(x, ' ')[[1]][col_idx], strsplit(input, '\n')[[1]]))
}