cachematrix.R

## Put comments here that give an overall description of what your
## functions do

## Matrix inversion is usually a costly computation and there may be some benefit 
## to caching the inverse of a matrix rather than compute it repeatedly 
## The following functions cache the inverse of a matrix instead of performing re-calculation
## everytime

## Write a short comment describing this function
## The following function creates a matrix which is really a list containing a function to
## 1) set the value of the matrix
## 2) get the value of the matrix
## 3) set the inverse of the matrix
## 4) get the inverse of the matrix

makeCacheMatrix <- function(x = matrix()) {
        inv <- NULL
        set <- function(y) {
                x <<- y
                inv <<- NULL
        }
        get <- function() x
        setinv <- function(inverse) inv <<- inverse
        getinv <- function() inv
        list(set = set, get = get,
             setinv = setinv,
             getinv = getinv)
}


## Write a short comment describing this function
## The following function calculates the inverse of the matrix created with the above function

cacheSolve <- function(x, ...) {
        ## Return a matrix that is the inverse of 'x'
        inv <- x$getinv()
        if(!is.null(inv)) {
                message("getting cached data")
                return(inv)
        }
        data <- x$get()
        inv <- solve(data, ...)
        x$setinv(inv)
        return(inv)
}