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cachematrix.R
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## This is a pair of functions that cache the inverse of a matrix.
## This function creates a special "matrix" object that can cache its inverse.
makeCacheMatrix <- function(x = matrix()) {
inv <- NULL
set <- function(y) {
x <<- y
inv <<- NULL
}
get <- function() x
setinv <- function(invx) inv <<- invx
getinv <- function() inv
list(set = set, get = get,
setinv = setinv,
getinv = getinv)
}
## 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 retrieves the inverse from the cache.
cacheSolve <- function(x, ...) {
invx <- x$getinv()
if(!is.null(invx)) {
message("Getting cached data.")
return(invx)
}
data <- x$get()
invx <- solve(data)
x$setinv(invx)
invx
}