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cachematrix.R
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cachematrix.R
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## This function creates a special Matrix object
## that cacn cache its inversed value so the next lookup
## of the same matrix will not "calculate" but use
## the cached value
makeCacheMatrix <- function(x = matrix()) {
m <- NULL
set <- function(y) {
x <<- y
m <<- NULL
}
get <- function() x
setinv <- function(inv) m <<- inv
getinv <- function() m
#return the available functions
list(set = set, get = get,
setinv = setinv,
getinv = getinv)
}
## This function computes the inverse of a matrix
## only if it's not calculated before
## if calculated before; it returns it from cache
cacheSolve <- function(x, ...) {
m <- x$getinv()
if(!is.null(m)) {
message("getting cached data")
return(m)
}
data <- x$get()
# compete the inverse
m <- solve(data, ...)
# cache the result
x$setinv(m)
m
}