R help - Sep 2016 - R freezing issue when checking to see if variable belongs to two different vectors

I often find myself trying to get a quick assessment of how much of one vector
is inside of another vector. I almost always try this with variables that are
some sort of identifier, like a client id number or an SSN. I typically do this:

table( DF1$Identifier %in% DF2$Identifier)

This will return a count of True and False logical responses. However, sometimes
when I try to do this my computer will freeze and I am unable to stop or escape
the process, requiring me to shutdown R via the task manager. I was wondering if
anybody else experiences this and, if so, why this might be happening.

Thanks in advance,

Joel


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It might help if you specify your hardware, OS (presumably Windows?)
and version, and your R version. Also possibly how large your vectors
are and what other processes you have running.

Other than that, I have no clue, of course.

Cheers,
Bert




Bert Gunter

"The trouble with having an open mind is that people keep coming along
and sticking things into it."
-- Opus (aka Berkeley Breathed in his "Bloom County" comic strip )


On Fri, Sep 23, 2016 at 11:42 AM, Joel Stewart <jstewart at provplan.org>
wrote:
> I often find myself trying to get a quick assessment of how much of one
vector is inside of another vector. I almost always try this with variables that
are some sort of identifier, like a client id number or an SSN. I typically do
this:
>
> table( DF1$Identifier %in% DF2$Identifier)
>
> This will return a count of True and False logical responses. However,
sometimes when I try to do this my computer will freeze and I am unable to stop
or escape the process, requiring me to shutdown R via the task manager. I was
wondering if anybody else experiences this and, if so, why this might be
happening.
>
> Thanks in advance,
>
> Joel
>
>
>         [[alternative HTML version deleted]]
>
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> and provide commented, minimal, self-contained, reproducible code.

On 23/09/2016 2:42 PM, Joel Stewart wrote:
> I often find myself trying to get a quick assessment of how much of one
vector is inside of another vector. I almost always try this with variables that
are some sort of identifier, like a client id number or an SSN. I typically do
this:
>
> table( DF1$Identifier %in% DF2$Identifier)
>
> This will return a count of True and False logical responses. However,
sometimes when I try to do this my computer will freeze and I am unable to stop
or escape the process, requiring me to shutdown R via the task manager. I was
wondering if anybody else experiences this and, if so, why this might be
happening.
No, I've never seen that.

If you ever find a reproducible example to trigger that, please post it 
to the bug list.  (This might be a little hard if you've never posted 
there before; due to abuse by spammers, we need to authorize each user 
manually.  But at least we only need to do that once per user.)

If you can't make this happen reproducibly, it probably won't get 
investigated.

Duncan Murdoch