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cachematrix.R
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cachematrix.R
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## Set up inverse matrix storage and retrieval in
## cache during first and subsequent calls, respectively
## Creates a list of functions necessary to store and retrieve
## inverse matrix
makeCacheMatrix <- function(x = matrix()) {
m <- matrix()
set <- function(y) {
x <<- y
m <<- matrix()
}
get <- function() x
setinverse <- function(solve) m <<- solve
getinverse <- function() m
list(set = set, get = get,
setinverse = setinverse,
getinverse = getinverse)
}
## Returns an inverse matrix on first call, using function 'solve'
## Retrieves inverse matrix from cache during subsequent calls
cacheSolve <- function(x, ...) {
## Return a matrix that is the inverse of 'x'
m <- x$getinverse()
if(all(!is.na(m))) {
message("getting cached data")
return(m)
}
data <- x$get()
m <- solve(data, ...)
x$setinverse(m)
m
}