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cachematrix.R
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44 lines (37 loc) · 1.15 KB
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## The idea behind is very similar to the example, just with a
## 2-dim vector and a different function: solve.
##
## makeCacheMatrix creates a special "matrix", which is really a list containing a function to
## -set the value of the matrix
## -get the value of the matrix
## -set the value of the inverse matrix
## -get the value of the inverse matrix
makeCacheMatrix <- function(x = matrix()) {
A <- NULL
set <- function(y) {
x <<- y
A <<- NULL
}
get <- function() x
setinv <- function(invers) A <<- invers
getinv <- function() A
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 should retrieve the inverse from the cache
##and print the string "getting cached data".
cacheSolve <- function(x, ...) {
## Return a matrix that is the inverse of 'x'
A <- x$getinv()
if(!is.null(A)) {
message("getting cached data")
return(A)
}
data <- x$get()
A <- solve(data, ...)
x$setinv(A)
A
}