Hello,
I am not sure I understand the question.
You say that
One way to prevent this [to print the attributes] is to set the
function's environment to the global environment.
But this is not true, just see the example below, where I set the
function's environment to .GlobalEnv
myfunction2 = function (){
f = function () NULL
attributes (f) = list (class="myfunction2", myattribute2=1)
environment(f) <- .GlobalEnv
f
}
myfunction2.f = myfunction2 ()
myfunction2.f
#function ()
# NULL
#attr(,"class")
#[1] "myfunction2"
#attr(,"myattribute2")
#[1] 1
environment(myfunction2.f)
#<environment: R_GlobalEnv>
When you run the function's name, the function's definition is printed,
all of it. If you want to print its return value you have to call it
with the parenthesis:
myfunction2.f() # My function
#NULL
myfunction.f() # Your function
#NULL
If you want to print the body of the function, use, well, body().
body(myfunction.f)
#NULL
Hope this helps,
Rui Barradas
Às 04:16 de 14/08/2018, Abs Spurdle escreveu:
Hi All
When you print a function constructed within a function, R prints it's
environment.
For example:
myfunction = function ()
+ { f = function () NULL
+ attributes (f) = list (class="myfunction", myattribute=1)
+ f
+ }
myfunction.f = myfunction ()
myfunction.f
function ()
NULL
<environment: 0x03fcbc30>
attr(,"class")
[1] "myfunction"
attr(,"myattribute")
[1] 1
One way to prevent this is to set the function's environment to the global
environment.
But I was wondering if there's a way to stop R from printing the
environment without changing the environment?
kind regards
Abs
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