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cachematrix.R
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36 lines (31 loc) · 1000 Bytes
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## pair of functions that cache the inverse of a matrix to avoid costly computations
## makeCacheMatrix creates a special "matrix" object that can cache its inverse.
makeCacheMatrix <- function(x = matrix()) {
inverse <- NULL
get <- function()x
set <- function(y)
{
x <<- y
inverse <<- NULL
}
getInverse <- function()inverse
setInverse <-function(z)inverse<<-z
list(get = get, set = set, getInverse = getInverse, setInverse = setInverse)
}
## cacheSolve: 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.
cacheSolve <- function(x, ...) {
inverse <- x$getInverse
## Return a matrix that is the inverse of 'x'
if( !is.null(inverse))
{
message("getting cached data")
return(inverse)
}
matrx <- x$get()
mat <- solve(matrx,...)
x$setInverse(mat)
mat
}