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cachematrix.R
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cachematrix.R
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## Provides a matrix wrapper (makeCacheMatrix) that allows the caching
## of the matrix inverse for repeated use (cacheSolve)
## Provides gets/sets for a matrix object and its inverse, ensuring
## the inverse gets cleared if the original matrix is overwritten
makeCacheMatrix <- function(x = matrix()) {
i <- NULL
set <- function(y) {
x <<- y
i <<- NULL
}
get <- function() x
setinv <- function(inverse) i <<- inverse
getinv <- function() i
list(set = set, get = get,
setinv = setinv,
getinv = getinv)
}
## checks for a cached inverse of the matrix. If this doesn't exist,
## compute it, save it for later, and return it
cacheSolve <- function(x, ...) {
i <- x$getinv()
if(!is.null(i)) {
message("getting cached data")
return(i)
}
data <- x$get()
i <- solve(data, ...)
## Save the data away so we can have it for later
x$setinv(i)
## Return a matrix that is the inverse of 'x'
i
}