dear memebers,
I am using R in AWS linux instance for my
research. I want to remove certain objects from the global environment to
reduce my EBS cost..for example, I want to remove all objects of class
"xts", "zoo". Is there any way to automate this, instead of
removing the objects one by one?
Basically, I want to subset ls() according to class, and then remove that
subset by using rm function.
I got to know about mget in SO, but that is not working in my case....
Also, all the above objects end with ".NS". I came to know that you
can remove objects starting with a certain pattern; is there any way to remove
objects ending in a certain pattern?
very many thanks for your time and effort...
yours sincerely,
AKSHAY M KULKARNI
[[alternative HTML version deleted]]
Looking at ?rm, my solution would be something like
rm(list = grep("\\.NS$", ls(), value = TRUE))
But test it since I have not tested it.
Peter
On Fri, Jul 27, 2018 at 10:58 PM akshay kulkarni <akshay_e4 at
hotmail.com> wrote:>
> dear memebers,
> I am using R in AWS linux instance for my
research. I want to remove certain objects from the global environment to
reduce my EBS cost..for example, I want to remove all objects of class
"xts", "zoo". Is there any way to automate this, instead of
removing the objects one by one?
>
> Basically, I want to subset ls() according to class, and then remove that
subset by using rm function.
>
> I got to know about mget in SO, but that is not working in my case....
>
> Also, all the above objects end with ".NS". I came to know that
you can remove objects starting with a certain pattern; is there any way to
remove objects ending in a certain pattern?
>
> very many thanks for your time and effort...
> yours sincerely,
> AKSHAY M KULKARNI
>
> [[alternative HTML version deleted]]
>
> ______________________________________________
> R-help at r-project.org mailing list -- To UNSUBSCRIBE and more, see
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide
http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
You can extract the names into a character vector with ls and then use grep(..., values=TRUE ) to select which ones you want to remove, and then pass that list to rm. However, due to the way R handles memory you are unlikely to see much savings by doing this. I would recommend focusing on creating a script or series of scripts that can allow you to re-create your analysis, and then restarting R whenever you are ready to reduce memory usage. This will have the side benefit of leaving you with a verified-complete record of how your analysis was done. On July 27, 2018 10:58:36 PM PDT, akshay kulkarni <akshay_e4 at hotmail.com> wrote:>dear memebers, >I am using R in AWS linux instance for my research. I want to remove >certain objects from the global environment to reduce my EBS cost..for >example, I want to remove all objects of class "xts", "zoo". Is there >any way to automate this, instead of removing the objects one by one? > >Basically, I want to subset ls() according to class, and then remove >that subset by using rm function. > >I got to know about mget in SO, but that is not working in my case.... > >Also, all the above objects end with ".NS". I came to know that you >can remove objects starting with a certain pattern; is there any way to >remove objects ending in a certain pattern? > >very many thanks for your time and effort... >yours sincerely, >AKSHAY M KULKARNI > > [[alternative HTML version deleted]] > >______________________________________________ >R-help at r-project.org mailing list -- To UNSUBSCRIBE and more, see >https://stat.ethz.ch/mailman/listinfo/r-help >PLEASE do read the posting guide >http://www.R-project.org/posting-guide.html >and provide commented, minimal, self-contained, reproducible code.-- Sent from my phone. Please excuse my brevity.
The ll() function of R.oo returns a data.frame with various attributes that you can subset on, e.g.> subset(R.oo::ll(), data.class %in% c("zoo", "xts"))member data.class dimension objectSize 2 fz zoo 10 1344 4 sample.xts xts c(180,4) 10128 5 x zoo 5 528 6 x1 zoo 5 880 7 x2 zoo 5 496 9 y zoo 5 1040 11 z zoo c(5,3) 1184 12 z0 zoo 0 448 13 z2 zoo c(4,3) 904 14 z20 zoo c(4,0) 616 15 z3 zoo 8 528 16 z4 zoo 5 592 17 z5 zoo 5 792 Henrik On Sat, Jul 28, 2018, 08:22 Jeff Newmiller <jdnewmil at dcn.davis.ca.us> wrote:> You can extract the names into a character vector with ls and then use > grep(..., values=TRUE ) to select which ones you want to remove, and then > pass that list to rm. > > However, due to the way R handles memory you are unlikely to see much > savings by doing this. I would recommend focusing on creating a script or > series of scripts that can allow you to re-create your analysis, and then > restarting R whenever you are ready to reduce memory usage. This will have > the side benefit of leaving you with a verified-complete record of how your > analysis was done. > > On July 27, 2018 10:58:36 PM PDT, akshay kulkarni <akshay_e4 at hotmail.com> > wrote: > >dear memebers, > >I am using R in AWS linux instance for my research. I want to remove > >certain objects from the global environment to reduce my EBS cost..for > >example, I want to remove all objects of class "xts", "zoo". Is there > >any way to automate this, instead of removing the objects one by one? > > > >Basically, I want to subset ls() according to class, and then remove > >that subset by using rm function. > > > >I got to know about mget in SO, but that is not working in my case.... > > > >Also, all the above objects end with ".NS". I came to know that you > >can remove objects starting with a certain pattern; is there any way to > >remove objects ending in a certain pattern? > > > >very many thanks for your time and effort... > >yours sincerely, > >AKSHAY M KULKARNI > > > > [[alternative HTML version deleted]] > > > >______________________________________________ > >R-help at r-project.org mailing list -- To UNSUBSCRIBE and more, see > >https://stat.ethz.ch/mailman/listinfo/r-help > >PLEASE do read the posting guide > >http://www.R-project.org/posting-guide.html > >and provide commented, minimal, self-contained, reproducible code. > > -- > Sent from my phone. Please excuse my brevity. > > ______________________________________________ > R-help at r-project.org mailing list -- To UNSUBSCRIBE and more, see > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide > http://www.R-project.org/posting-guide.html > and provide commented, minimal, self-contained, reproducible code. >[[alternative HTML version deleted]]
> objClasses <- unlist(eapply(.GlobalEnv, function(x)class(x)[1])) > head(objClasses)f E "function" "environment" df h "tbl_df" "function" myData L "list" "list"> names(objClasses)[objClasses=="tbl_df"][1] "df" "out" Bill Dunlap TIBCO Software wdunlap tibco.com On Fri, Jul 27, 2018 at 10:58 PM, akshay kulkarni <akshay_e4 at hotmail.com> wrote:> dear memebers, > I am using R in AWS linux instance for my > research. I want to remove certain objects from the global environment to > reduce my EBS cost..for example, I want to remove all objects of class > "xts", "zoo". Is there any way to automate this, instead of removing the > objects one by one? > > Basically, I want to subset ls() according to class, and then remove that > subset by using rm function. > > I got to know about mget in SO, but that is not working in my case.... > > Also, all the above objects end with ".NS". I came to know that you can > remove objects starting with a certain pattern; is there any way to remove > objects ending in a certain pattern? > > very many thanks for your time and effort... > yours sincerely, > AKSHAY M KULKARNI > > [[alternative HTML version deleted]] > > ______________________________________________ > R-help at r-project.org mailing list -- To UNSUBSCRIBE and more, see > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide http://www.R-project.org/ > posting-guide.html > and provide commented, minimal, self-contained, reproducible code. >[[alternative HTML version deleted]]
dear peter,
Its working....thanks a lot...
yours sincerely,
AKSHAY M KULKARNI
________________________________
From: Peter Langfelder <peter.langfelder at gmail.com>
Sent: Saturday, July 28, 2018 11:41 AM
To: akshay_e4 at hotmail.com
Cc: r-help
Subject: Re: [R] subsetting ls() as per class...
Looking at ?rm, my solution would be something like
rm(list = grep("\\.NS$", ls(), value = TRUE))
But test it since I have not tested it.
Peter
On Fri, Jul 27, 2018 at 10:58 PM akshay kulkarni <akshay_e4 at
hotmail.com> wrote:>
> dear memebers,
> I am using R in AWS linux instance for my
research. I want to remove certain objects from the global environment to
reduce my EBS cost..for example, I want to remove all objects of class
"xts", "zoo". Is there any way to automate this, instead of
removing the objects one by one?
>
> Basically, I want to subset ls() according to class, and then remove that
subset by using rm function.
>
> I got to know about mget in SO, but that is not working in my case....
>
> Also, all the above objects end with ".NS". I came to know that
you can remove objects starting with a certain pattern; is there any way to
remove objects ending in a certain pattern?
>
> very many thanks for your time and effort...
> yours sincerely,
> AKSHAY M KULKARNI
>
> [[alternative HTML version deleted]]
>
> ______________________________________________
> R-help at r-project.org mailing list -- To UNSUBSCRIBE and more, see
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide
http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
[[alternative HTML version deleted]]