On 13/02/2012 2:00 PM, Michael wrote:
Hi all,
I made sure that it's "env$sRes1$nPositionsOptimizedM" that's correct...
not the "env$sRes1$nPositionsOptimized"...
But it seems both point to the same memory area...
How did you determine that? The test below just shows that they contain
the same thing.
This is very dangerous because I have used naming conventions such as:
MyLongVariableNameForA
MyLongVariableNameForB
MyLongVariableNameForC
...
...
Then if internally they are actually the same thing then all my programs
messed up...
Any thoughts?
>env=new.env()
>load("MyResults.rData", env)
>identical(env$sRes1$nPositionsOptimized, env$sRes1$nPositionsOptimizedM)
[1] TRUE
Changing one of them and seeing the other one change would show that
they point to the same memory area. This can happen with environments:
if you create env1 and set env2 <- env1, then changes to either
environment will affect the other, because that's how environments
work. That's not true of most of the other kinds of objects in R.
(The exceptions are fairly exotic things that you are unlikely to use.)
Duncan Murdoch
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