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cachematrix.R
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52 lines (42 loc) · 1.54 KB
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## File: cachematrix.R
## Description: Contains functions to compute and cache the inverse of a matrix
## Function: makeCacheMatrix
## Description: creates a special "matrix", which is really a list containing a function to perform the following:
## 1. set the value of the inverse matrix
## 2. get the value of the inverse matrix
## 3. set the value of the inverse matrix
## 4. get the value of the inverse matrix
## Inputs: an invertible matrix to "specialize"
## Outputs: specialized matrix with cache inverse functionality
makeCacheMatrix <- function(x = matrix()) {
m <- NULL
set <- function(y) {
x <<- y
m <<- NULL
}
get <- function() x
setinverse <- function(solve) m <<- solve
getinverse <- function() m
list(set = set, get = get,
setinverse = setinverse,
getinverse = getinverse)
}
## Function: cacheSolve
## Description: computes the inverse of the special "matrix" returned by makeCacheMatrix
## if inverse has already been calculated (and the matrix has not changed via 'set')
## then will inverse from the cache.
## Inputs: specially formatted "matrix" via makeCacheMatrix
## Output: inverse of matrix provided
cacheSolve <- function(x, ...) {
## Return a matrix that is the inverse of 'x'
m <- x$getinverse()
if(!is.null(m)) {
message("getting cached inverse matrix data")
return(m)
}
data <- x$get()
#compare source matrix with provided
m <- solve(data, ...)
x$setinverse(m)
m
}