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cachematrix.R
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## The following functions illustrate the use of R scoping rules to cache potentially time consuming computations
## function to create a special matrix object that can cache its inverse
makeCacheMatrix <- function(x = matrix()) {
x_inverse <- NULL
set <- function(y){
x <<- y
x_inverse <<- NULL
}
get <- function() x
setInverse <- function(inverse) x_inverse <<- inverse
getInverse <- function() x_inverse
list(set = set,get = get,setInverse = setInverse, getInverse = getInverse)
}
## 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.
cacheSolve <- function(x, ...) {
x_inverse <- x$getInverse()
if(!is.null(x_inverse)){
print("Getting cached inverse.")
return(x_inverse)
}
data <- x$get()
print("calculating x inverse.")
inverse <- solve(data)
#cache the computed value for inverse
x$setInverse(inverse)
inverse
}