forked from rdpeng/ProgrammingAssignment2
-
Notifications
You must be signed in to change notification settings - Fork 0
Expand file tree
/
Copy pathcachedInverseMatrix.R
More file actions
62 lines (46 loc) · 1.37 KB
/
cachedInverseMatrix.R
File metadata and controls
62 lines (46 loc) · 1.37 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
## A pair of functions that calculates the inverse of matrix and if already calculated returns the cached value of the
## inverse
## Creates a special matrix object that can cache its inverse
makeCacheMatrix <- function( mat= matrix() ) {
## Initialize the inverse property
inv <- NULL
## Method to set the matrix
set <- function( matrix ) {
mat <<- matrix
inv <<- NULL
}
## Method the get the matrix
get <- function() {
mat
}
## set method for inverse
setInverse <- function(inverse) {
inv <<- inverse
}
## get method
getInverse <- function() {
inv
}
## Return a list of the methods
list(set = set, get = get,
setInverse = setInverse,
getInverse = getInverse)
}
## Compute the inverse of the matrix and if already calculated returns the cached value of the matrix
cacheSolve <- function(x, ...) {
## Return a matrix that is the inverse of 'x'
mat <- x$getInverse()
## Just return the inverse if its already set
if( !is.null(mat) ) {
message("getting cached matrix")
return(mat)
}
## Get the matrix from our object
data <- x$get()
## Calculate the inverse using matrix multiplication
mat <- solve(data) %*% data
## Set the inverse to the object
x$setInverse(mat)
## Return the matrix
mat
}