execute environment
Post on 16-Apr-2017
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> f <- function(x,y) x+y
> f(1,2)
[1] 3
f <-function(x,y) x+y
formals: (x,y)body: x+y
f <-function(x,y) x+y
formals: (x,y)body: x+y
f <-function(x,y) x+y
formals: (x,y)body: x+y
f <-function(x,y) x+y
formals: (x,y)body: x+y
f <-function(x,y) x+y
f <-function(x,y) x+y
f:
formals: (x,y)body: x+y
f <-function(x,y) x+y
f:
formals: (x,y)body: x+y
f <-function(x,y) x+y
f:
formals: (x,y)body: x+y
f:
formals: (x,y)body: x+y
f (1,2)
f:
formals: (x,y)body: x+y
f (1,2)
f:
formals: (x,y)body: x+y
x:1, y:2
f (1,2)
f:
formals: (x,y)body: x+y
x:1, y:2
f (1,2)
f:
formals: (x,y)body: x+y
x:1, y:2
f (1,2)
f:
formals: (x,y)body: x+y
x:1, y:2
f (1,2)
f:
formals: (x,y)body: x+y
x:1, y:2
f (1,2)
f:
formals: (x,y)body: x+y
x:1, y:2
f (1,2)
f:
formals: (x,y)body: x+y
x:1, y:2
f (1,2)
f:
formals: (x,y)body: x+y
x:1, y:2
f (1,2)
f:
formals: (x,y)body: x+y
x:1, y:2
f (1,2)
f:
formals: (x,y)body: x+y
x:1, y:2
f:
x:1y:2 formals: x, y
body: x+y
f:
x:1y:2 formals: x, y
body: x+y
x:1, y:2
x:3, y:4, z:5
z:6, w:7
a:1, b:2
x:1, y:2, z:5, w:7a:???, b:???
f (1,2)
f:
formals: (x,y)body: x+y
x:1, y:2
f (1,2)
f:
formals: (x,y)body: x+y
x:1, y:2
f (1,2)
f:
formals: (x,y)body: x+y
x:1, y:2
f (1,2)
f:
formals: (x,y)body: x+y
x:1, y:2
x+y
f (1,2)
f:
formals: (x,y)body: x+y
x:1, y:2
x+y
f (1,2)
f:
formals: (x,y)body: x+y
x:1, y:2
1+2
f (1,2)
f:
formals: (x,y)body: x+y
x:1, y:2
3
3
f:
formals: (x,y)body: x+y
x:1, y:2
3
f:
formals: (x,y)body: x+y
x:1, y:2
3
f:
formals: (x,y)body: x+y
x:1, y:2
3
f:
formals: (x,y)body: x+y
x:1, y:2
> f <- function(x) g(x)
> g <- function(x) h(x)
> h <- function(x) x+1
> f(2)
[1] 3
f <- function(x) g(x)
f:
formals: (x)body: g(x)
f <- function(x) g(x)
f:
formals: (x)body: g(x)
f:
formals: (x)body: g(x)
g <- function(x) h(x)
f:
formals: (x)body: g(x)
formals: (x)body: h(x)
g:
g <- function(x) h(x)
f:
formals: (x)body: g(x)
formals: (x)body: h(x)
g:
f:
formals: (x)body: g(x)
formals: (x)body: h(x)
g:
h <- function(x) x+1
f:
formals: (x)body: g(x)
formals: (x)body: h(x)
formals: (x)body: x+1
h:g:
h <- function(x) x+1
f:
formals: (x)body: g(x)
formals: (x)body: h(x)
formals: (x)body: x+1
h:g:
f:
formals: (x)body: g(x)
formals: (x)body: h(x)
formals: (x)body: x+1
h:g:
f(2)
f:
formals: (x)body: g(x)
formals: (x)body: h(x)
formals: (x)body: x+1
h:g:
x:2
f(2)
f:
formals: (x)body: g(x)
formals: (x)body: h(x)
formals: (x)body: x+1
h:g:
x:2
f(2)
f:
formals: (x)body: g(x)
formals: (x)body: h(x)
formals: (x)body: x+1
h:g:
x:2
f(2)
g(x)
f:
formals: (x)body: g(x)
formals: (x)body: h(x)
formals: (x)body: x+1
h:g:
x:2
f(2)
g(2)
f:
formals: (x)body: g(x)
formals: (x)body: h(x)
formals: (x)body: x+1
h:g:
x:2
f(2)
x:2
g(2)
f:
formals: (x)body: g(x)
formals: (x)body: h(x)
formals: (x)body: x+1
h:g:
x:2
x:2
f(2)
g(2)
f:
formals: (x)body: g(x)
formals: (x)body: h(x)
formals: (x)body: x+1
h:g:
x:2
x:2
f(2)
g(2)h(x)
f:
formals: (x)body: g(x)
formals: (x)body: h(x)
formals: (x)body: x+1
h:g:
x:2
x:2
f(2)
g(2)h(2)
f:
formals: (x)body: g(x)
x:2
formals: (x)body: h(x)
formals: (x)body: x+1
h:g:
x:2
g(2)
x:2
h(2)
f(2)
f:
formals: (x)body: g(x)
x:2
formals: (x)body: h(x)
formals: (x)body: x+1
h:g:
x:2
g(2)
x:2
h(2)
f(2)
f:
formals: (x)body: g(x)
x:2
formals: (x)body: h(x)
formals: (x)body: x+1
h:g:
x:2
g(2)
x:2
h(2)
f(2)
x+1
f:
formals: (x)body: g(x)
x:2
formals: (x)body: h(x)
formals: (x)body: x+1
h:g:
x:2
g(2)
x:2
h(2)
f(2)
2+1
f:
formals: (x)body: g(x)
x:2
formals: (x)body: h(x)
formals: (x)body: x+1
h:g:
x:2
g(2)
x:2
h(2)
f(2)
3
f:
formals: (x)body: g(x)
x:2
formals: (x)body: h(x)
formals: (x)body: x+1
h:g:
x:2
g(2)
x:2
3
f(2)
f:
formals: (x)body: g(x)
x:2
formals: (x)body: h(x)
formals: (x)body: x+1
h:g:
x:2
3
x:2
f(2)
f:
formals: (x)body: g(x)
x:2
formals: (x)body: h(x)
formals: (x)body: x+1
h:g:
x:2
x:2
3
> fact <- function(n) {
+ if (n==1) 1
+ else n * fact(n-1)
+ }
> fact(3)
[1] 6
fact <- function(n) if (n==1) 1 else n*fact(n-1)
fact:
formals: (n)body: if (n==1) 1
else n*fact(n-1)
fact <- function(n) if (n==1) 1 else n*fact(n-1)
fact:
formals: (n)body: if (n==1) 1
else n*fact(n-1)
fact(3)
fact:
formals: (n)body: if (n==1) 1
else n*fact(n-1)
n:3
fact(3)
fact:
formals: (n)body: if (n==1) 1
else n*fact(n-1)
n:3
fact(3)
fact:
formals: (n)body: if (n==1) 1
else n*fact(n-1)
n:3
fact(3)
fact:
formals: (n)body: if (n==1) 1
else n*fact(n-1)
if (n==1) 1else n*fact(n-1)
n:3
fact(3)
fact:
formals: (n)body: if (n==1) 1
else n*fact(n-1)
if (3==1) 1else 3*fact(3-1)
fact:
formals: (n)body: if (n==1) 1
else fact(n-1)
n:3
3*fact(2)
fact(3)
fact:
formals: (n)body: if (n==1) 1
else fact(n-1)
n:3
3*fact(2)
fact(3)
n:2
fact:
formals: (n)body: if (n==1) 1
else fact(n-1)
n:3
3*fact(2)
fact(3)
n:2
fact:
formals: (n)body: if (n==1) 1
else fact(n-1)
n:3
3*fact(2)
fact(3)
n:2
if (n==1) 1else n*fact(n-1)
fact:
formals: (n)body: if (n==1) 1
else fact(n-1)
n:3
3*fact(2)
fact(3)
n:2
if (2==1) 1else 2*fact(2-1)
fact:
formals: (n)body: if (n==1) 1
else fact(n-1)
n:3
3*fact(2)
fact(3)
n:2
2*fact(1)
fact:
formals: (n)body: if (n==1) 1
else fact(n-1)
n:3
3*fact(2)
fact(3)
n:2
2*fact(1)
n:1
fact:
formals: (n)body: if (n==1) 1
else fact(n-1)
n:3
3*fact(2)
fact(3)
n:2
2*fact(1)
n:1
fact:
formals: (n)body: if (n==1) 1
else fact(n-1)
n:3
3*fact(2)
fact(3)
n:2
2*fact(1)
n:1
if (1==1) 1else fact(1-1)
fact:
formals: (n)body: if (n==1) 1
else fact(n-1)
n:3
3*fact(2)
fact(3)
n:2
2*fact(1)
n:1
1
fact:
formals: (n)body: if (n==1) 1
else fact(n-1)
n:3
3*fact(2)
fact(3)
n:2
2*1
n:1
fact:
formals: (n)body: if (n==1) 1
else fact(n-1)
n:3
3*fact(2)
fact(3)
n:2
2
n:1
fact:
formals: (n)body: if (n==1) 1
else fact(n-1)
n:3
3*2
fact(3)
n:2 n:1
fact:
formals: (n)body: if (n==1) 1
else fact(n-1)
n:3
6
fact(3)
n:2 n:1
fact:
formals: (n)body: if (n==1) 1
else fact(n-1)
n:3
6
n:2 n:1
> make.counter <- function(n) {
+ function() {
+ n <<- n+1
+ n
+ }
+ }
> c1 <- make.counter(0)
> c1()
[1] 1
> c2 <- make.counter(100)
> c2()
[1] 101
> c1()
[1] 2
> c2()
[1] 102
make.counter <- function(n) function() { n << - n + 1 n }
make.counter:
formals: (n)body: function() { n <<- n + 1 n }
make.counter <- function(n) function() { n << - n + 1 n }
make.counter:
formals: (n)body: function() { n <<- n + 1 n }
make.counter:
formals: (n)body: function() { n <<- n + 1 n }
c1 <- make.counter(0)
make.counter:
formals: (n)body: function() { n <<- n + 1 n }
c1 <- make.counter(0)
n:0
make.counter:
formals: (n)body: function() { n <<- n + 1 n }
c1 <- make.counter(0)
n:0
make.counter:
formals: (n)body: function() { n <<- n + 1 n }
n:0
function() { n << - n + 1 n}
c1 <- make.counter(0)
make.counter:
formals: (n)body: function() { n <<- n + 1 n }
n:0
function() { n << - n + 1 n}
formals: ()body:{ n <<- n + 1 n }
c1 <- make.counter(0)
make.counter:
formals: (n)body: function() { n <<- n + 1 n }
c1 <- make.counter(0)
n:0
formals: ()body:{ n <<- n + 1 n }
c1:
make.counter:
formals: (n)body: function() { n <<- n + 1 n }
n:0
formals: ()body:{ n <<- n + 1 n }
c1:
make.counter:
formals: (n)body: function() { n <<- n + 1 n }
n:0
formals: ()body:{ n <<- n + 1 n }
c1:
make.counter:
formals: (n)body: function() { n <<- n + 1 n }
n:0
formals: ()body:{ n <<- n + 1 n }
c1:
c1()
make.counter:
formals: (n)body: function() { n <<- n + 1 n }
n:0
formals: ()body:{ n <<- n + 1 n }
c1:
c1()
make.counter:
formals: (n)body: function() { n <<- n + 1 n }
n:0
formals: ()body:{ n <<- n + 1 n }
c1:
c1()
make.counter:
formals: (n)body: function() { n <<- n + 1 n }
n:0
formals: ()body:{ n <<- n + 1 n }
c1:
c1()
n << - n + 1
make.counter:
formals: (n)body: function() { n <<- n + 1 n }
n:1
formals: ()body:{ n <<- n + 1 n }
c1:
c1()
n << - n + 1
make.counter:
formals: (n)body: function() { n <<- n + 1 n }
n:1
formals: ()body:{ n <<- n + 1 n }
c1:
c1()
n
make.counter:
formals: (n)body: function() { n <<- n + 1 n }
n:1
formals: ()body:{ n <<- n + 1 n }
c1:
c1()
1
make.counter:
formals: (n)body: function() { n <<- n + 1 n }
n:1
formals: ()body:{ n <<- n + 1 n }
c1:
1
make.counter:
formals: (n)body: function() { n <<- n + 1 n }
n:1
formals: ()body:{ n <<- n + 1 n }
c1:
make.counter:
formals: (n)body: function() { n <<- n + 1 n }
n:1
formals: ()body:{ n <<- n + 1 n }
c1:
c2<-make.counter(100)
make.counter:
formals: (n)body: function() { n <<- n + 1 n }
n:1
formals: ()body:{ n <<- n + 1 n }
c1:
n:100
c2<-make.counter(100)
make.counter:
formals: (n)body: function() { n <<- n + 1 n }
n:1
formals: ()body:{ n <<- n + 1 n }
c1:
c2<-make.counter(100)
n:100
make.counter:
formals: (n)body: function() { n <<- n + 1 n }
n:1
formals: ()body:{ n <<- n + 1 n }
c1:
c2<-make.counter(100)
n:100
function() { n << - n + 1 n}
make.counter:
formals: (n)body: function() { n <<- n + 1 n }
n:1
formals: ()body:{ n <<- n + 1 n }
c1:
n:100
function() { n << - n + 1 n}
formals: ()body:{ n <<- n + 1 n }
c2<-make.counter(100)
make.counter:
formals: (n)body: function() { n <<- n + 1 n }
n:1
formals: ()body:{ n <<- n + 1 n }
c1:
n:100
formals: ()body:{ n <<- n + 1 n }
c2:c2<-make.counter(100)
make.counter:
formals: (n)body: function() { n <<- n + 1 n }
n:1
formals: ()body:{ n <<- n + 1 n }
c1:
n:100
formals: ()body:{ n <<- n + 1 n }
c2:
make.counter:
formals: (n)body: function() { n <<- n + 1 n }
n:1
formals: ()body:{ n <<- n + 1 n }
c1:
n:100
formals: ()body:{ n <<- n + 1 n }
c2:c2()
make.counter:
formals: (n)body: function() { n <<- n + 1 n }
n:1
formals: ()body:{ n <<- n + 1 n }
c1:
n:100
formals: ()body:{ n <<- n + 1 n }
c2:c2()
make.counter:
formals: (n)body: function() { n <<- n + 1 n }
n:1
formals: ()body:{ n <<- n + 1 n }
c1:
n:100
formals: ()body:{ n <<- n + 1 n }
c2:c2()
make.counter:
formals: (n)body: function() { n <<- n + 1 n }
n:1
formals: ()body:{ n <<- n + 1 n }
c1:
n:100
formals: ()body:{ n <<- n + 1 n }
c2:c2()
n << - n + 1
make.counter:
formals: (n)body: function() { n <<- n + 1 n }
n:1
formals: ()body:{ n <<- n + 1 n }
c1:
n:101
formals: ()body:{ n <<- n + 1 n }
c2:c2()
n << - n + 1
make.counter:
formals: (n)body: function() { n <<- n + 1 n }
n:1
formals: ()body:{ n <<- n + 1 n }
c1:
n:101
formals: ()body:{ n <<- n + 1 n }
c2:c2()
n
make.counter:
formals: (n)body: function() { n <<- n + 1 n }
n:1
formals: ()body:{ n <<- n + 1 n }
c1:
n:101
formals: ()body:{ n <<- n + 1 n }
c2:c2()
101
make.counter:
formals: (n)body: function() { n <<- n + 1 n }
n:1
formals: ()body:{ n <<- n + 1 n }
c1:
n:101
formals: ()body:{ n <<- n + 1 n }
c2:101
make.counter:
formals: (n)body: function() { n <<- n + 1 n }
n:1
formals: ()body:{ n <<- n + 1 n }
c1:
n:101
formals: ()body:{ n <<- n + 1 n }
c2:
make.counter:
formals: (n)body: function() { n <<- n + 1 n }
n:1
formals: ()body:{ n <<- n + 1 n }
c1:
n:101
formals: ()body:{ n <<- n + 1 n }
c2:c1()
make.counter:
formals: (n)body: function() { n <<- n + 1 n }
n:1
formals: ()body:{ n <<- n + 1 n }
c1:
n:101
formals: ()body:{ n <<- n + 1 n }
c2:c1()
make.counter:
formals: (n)body: function() { n <<- n + 1 n }
n:1
formals: ()body:{ n <<- n + 1 n }
c1:
n:101
formals: ()body:{ n <<- n + 1 n }
c2:c1()
make.counter:
formals: (n)body: function() { n <<- n + 1 n }
n:1
formals: ()body:{ n <<- n + 1 n }
c1:
n:101
formals: ()body:{ n <<- n + 1 n }
c2:c1()
n << - n + 1
make.counter:
formals: (n)body: function() { n <<- n + 1 n }
n:2
formals: ()body:{ n <<- n + 1 n }
c1:
n:101
formals: ()body:{ n <<- n + 1 n }
c2:c1()
n << - n + 1
make.counter:
formals: (n)body: function() { n <<- n + 1 n }
n:2
formals: ()body:{ n <<- n + 1 n }
c1:
n:101
formals: ()body:{ n <<- n + 1 n }
c2:c1()
n
make.counter:
formals: (n)body: function() { n <<- n + 1 n }
n:2
formals: ()body:{ n <<- n + 1 n }
c1:
n:101
formals: ()body:{ n <<- n + 1 n }
c2:c1()
2
make.counter:
formals: (n)body: function() { n <<- n + 1 n }
n:2
formals: ()body:{ n <<- n + 1 n }
c1:
n:101
formals: ()body:{ n <<- n + 1 n }
c2:2
make.counter:
formals: (n)body: function() { n <<- n + 1 n }
n:2
formals: ()body:{ n <<- n + 1 n }
c1:
n:101
formals: ()body:{ n <<- n + 1 n }
c2:
make.counter:
formals: (n)body: function() { n <<- n + 1 n }
n:2
formals: ()body:{ n <<- n + 1 n }
c1:
n:101
formals: ()body:{ n <<- n + 1 n }
c2:c2()
make.counter:
formals: (n)body: function() { n <<- n + 1 n }
n:2
formals: ()body:{ n <<- n + 1 n }
c1:
n:101
formals: ()body:{ n <<- n + 1 n }
c2:c2()
make.counter:
formals: (n)body: function() { n <<- n + 1 n }
n:2
formals: ()body:{ n <<- n + 1 n }
c1:
n:101
formals: ()body:{ n <<- n + 1 n }
c2:c2()
make.counter:
formals: (n)body: function() { n <<- n + 1 n }
n:2
formals: ()body:{ n <<- n + 1 n }
c1:
n:101
formals: ()body:{ n <<- n + 1 n }
c2:c2()
n << - n + 1
make.counter:
formals: (n)body: function() { n <<- n + 1 n }
n:2
formals: ()body:{ n <<- n + 1 n }
c1:
n:102
formals: ()body:{ n <<- n + 1 n }
c2:c2()
n << - n + 1
make.counter:
formals: (n)body: function() { n <<- n + 1 n }
n:2
formals: ()body:{ n <<- n + 1 n }
c1:
n:102
formals: ()body:{ n <<- n + 1 n }
c2:c2()
n
make.counter:
formals: (n)body: function() { n <<- n + 1 n }
n:2
formals: ()body:{ n <<- n + 1 n }
c1:
n:102
formals: ()body:{ n <<- n + 1 n }
c2:c2()
102
make.counter:
formals: (n)body: function() { n <<- n + 1 n }
n:2
formals: ()body:{ n <<- n + 1 n }
c1:
n:102
formals: ()body:{ n <<- n + 1 n }
c2:102
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