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cachematrix.R
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45 lines (35 loc) · 1.01 KB
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## Put comments here that give an overall description of what your
## functions do
## Write a short comment describing this function
makeCacheMatrix <- function(x = matrix()) {
inv <- NULL
set <- function(y){
x <<- y
inv <<- NULL
}
get <- function() x
setinv <- function(solve) inv <<- solve
getinv <- function() inv
list(set = set, get = get, setinv = setinv, getinv = getinv)
}
# This function delivers the inverted matrix from makeCacheMatrix,
# first looking for a cached version and if not there
# computing and returning the inversion.
cacheSolve <- function(x, ...) {
# Return an inverted matrix of the passed matrix.
inv <- x$getinv()
# Look for a cached version
if(!is.null(inv)) {
message("Aw yiss, a cached version.")
return(inv)
}
# Otherwise invert the matrix.
data <- x$get()
inv <- solve(data, ...)
x$setinv(inv)
inv
}
# Test it out
test <- makeCacheMatrix()
test$set(matrix(c(1:4),2,2))
cacheSolve(test)