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cachematrix.R
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cachematrix.R
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## Overview:
## Matrix inversion is usually a costly computation and their may be some benefit
## to caching the inverse of a matrix rather than compute it repeatedly.
## The function pair below can cache the inverse of a matrix.
## This function creates a special "matrix" object that can cache its inverse.
## It is actually a list containing a function to
## set the value of the matrix
## get the value of the matrix
## set the value of the inverse
## get the value of the inverse
makeCacheMatrix <- function(x = matrix()) {
i <- NULL # store invert matrix
set <- function(y){
x <<- y
i <<- NULL
}
get <- function() x
set_inverse <- function(inverse) i <<- inverse
get_inverse <- function() i
list(set = set, get = get,
set_inverse = set_inverse,
get_inverse = get_inverse)
}
## This function computes the inverse of the special "matrix" returned by makeCacheMatrix above.
## If the inverse has already been calculated (and the matrix has not changed),
## then the cachesolve should retrieve the inverse from the cache.
## Otherwise, the inverse will be calculated then returned at once.
cacheSolve <- function(x, ...) {
## Return a matrix that is the inverse of 'x'
i <- x$get_inverse()
if(!is.null(i)){
message("Getting cached data")
return(i)
}
data <- x$get()
i <- solve(data, ...)
x$set_inverse(i)
i
}