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cachematrix.R
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45 lines (39 loc) · 1.53 KB
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## Put comments here that give an overall description of what your
## functions do
## Write a short comment describing this function
## Note: in R, the function to calculate inverse is solve(c), so I named inverse as solve in all code below.
##The first function, makeCacheMatrix creates a special "vector", 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
##get the value of the inverse
makeCacheMatrix <- function(x = matrix()) {
m <- NULL
set <- function(y) {
x <<- y
m <<- NULL
}
get <- function() x
setsolve <- function(solve) m <<- solve
getsolve <- function() m
list(set = set, get = get,
setsolve = setsolve,
getsolve = getsolve)
}
## Write a short comment describing this function
##The 2nd function calculates the inverse with the above function.
##it first checks to see if the inverse has already been calculated. If so, it gets the inverse from the cache
##and skips the computation. Otherwise, it calculates the inverse of the data by calling solve(c), and sets
##the value of the inverse in the cache via the setsolve function.
cacheSolve <- function(x, ...) {
## Return a matrix that is the inverse of 'x'
m <- x$getsolve()
if(!is.null(m)) {
message("getting cached data")
return(m)
}
data <- x$get()
m <- solve(data, ...)
x$setsolve(m)
m
}