Re: [R] Import selected columns from sas7bdat file

[Utkarsh Singhal]

I am able to import the whole data set into R as well, and then select
the required columns. But what I am looking for is to optimize on the
run time, as I only need a few columns out of 100s.

Something similar to what fread (package data.table) provides while
importing from a CSV file.

Utkarsh Singhal
91.96508.54333



On Thu, Aug 10, 2017 at 6:00 PM, Anthony Damico  wrote:
> hi, the sas universal viewer might be a free, non-R way to convert a
> sas7bdat file to non-proprietary formats, not sure if it's windows-only.
> those other formats should be easier to import only a subset of columns into
> R..
>
> https://support.sas.com/downloads/browse.htm?fil==74
>
> On Thu, Aug 10, 2017 at 7:42 AM, peter dalgaard  wrote:
>>
>> I had a look at this a while back and it didn't seem to be easy. The path
>> of least resistance would seem to be to use SAS itself to create a data set
>> with fewer columns, but of course that requires you to get access to SAS.
>>
>> Otherwise, I think you'd have to modify sas7bdat::read.sas7bdat to drop
>> unselected columns. That function is pure R code, so it might not be quite
>> as hard as it sounds.
>>
>> Incidentally, do teach your mailer to not send plain text. It is not much
>> of a problem this time, but HTML mails can become quite unreadable on the
>> list.
>>
>>
>> -pd
>>
>>
>> > On 10 Aug 2017, at 12:24 , Utkarsh Singhal 
>> > wrote:
>> >
>> > Hello everyone,
>> >
>> > I want to import data from huge sas files with 100s of columns. The good
>> > thing is that I am only interested in a few selected columns. Is there
>> > any
>> > way to do that without loading the full dataset.
>> >
>> > I have tried two functions: (1) read.sas7bdat *[from library
>> > 'sas7bdat']*,
>> > and (2) read_sas *[from library 'haven']. *But couldn't find what I am
>> > looking for.
>> >
>> > Best regards,
>> > Utkarsh Singhal
>> > 91.96508.54333
>> >
>> >   [[alternative HTML version deleted]]
>> >
>> > __
>> > R-help@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.
>>
>> --
>> Peter Dalgaard, Professor,
>> Center for Statistics, Copenhagen Business School
>> Solbjerg Plads 3, 2000 Frederiksberg, Denmark
>> Phone: (+45)38153501
>> Office: A 4.23
>> Email: pd@cbs.dk  Priv: pda...@gmail.com
>>
>> __
>> R-help@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.
>
>

__
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Re: [R] Import selected columns from sas7bdat file

[peter dalgaard]

> On 10 Aug 2017, at 14:34 , Peter Dalgaard  wrote:
> 
> Incidentally, do teach your mailer to not send plain text. It is not much of 
> a problem this time, but HTML mails can become quite unreadable on the list.
> 

Gah! A "not" remained after editing. DO send plain text, of course.

-- 
Peter Dalgaard, Professor,
Center for Statistics, Copenhagen Business School
Solbjerg Plads 3, 2000 Frederiksberg, Denmark
Phone: (+45)38153501
Office: A 4.23
Email: pd@cbs.dk  Priv: pda...@gmail.com

__
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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.

Re: [R] Import selected columns from sas7bdat file

[Anthony Damico]

hi, the sas universal viewer might be a free, non-R way to convert a
sas7bdat file to non-proprietary formats, not sure if it's windows-only.
those other formats should be easier to import only a subset of columns
into R..

https://support.sas.com/downloads/browse.htm?fil==74

On Thu, Aug 10, 2017 at 7:42 AM, peter dalgaard  wrote:

> I had a look at this a while back and it didn't seem to be easy. The path
> of least resistance would seem to be to use SAS itself to create a data set
> with fewer columns, but of course that requires you to get access to SAS.
>
> Otherwise, I think you'd have to modify sas7bdat::read.sas7bdat to drop
> unselected columns. That function is pure R code, so it might not be quite
> as hard as it sounds.
>
> Incidentally, do teach your mailer to not send plain text. It is not much
> of a problem this time, but HTML mails can become quite unreadable on the
> list.
>
>
> -pd
>
>
> > On 10 Aug 2017, at 12:24 , Utkarsh Singhal 
> wrote:
> >
> > Hello everyone,
> >
> > I want to import data from huge sas files with 100s of columns. The good
> > thing is that I am only interested in a few selected columns. Is there
> any
> > way to do that without loading the full dataset.
> >
> > I have tried two functions: (1) read.sas7bdat *[from library
> 'sas7bdat']*,
> > and (2) read_sas *[from library 'haven']. *But couldn't find what I am
> > looking for.
> >
> > Best regards,
> > Utkarsh Singhal
> > 91.96508.54333
> >
> >   [[alternative HTML version deleted]]
> >
> > __
> > R-help@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.
>
> --
> Peter Dalgaard, Professor,
> Center for Statistics, Copenhagen Business School
> Solbjerg Plads 3, 2000 Frederiksberg, Denmark
> Phone: (+45)38153501
> Office: A 4.23
> Email: pd@cbs.dk  Priv: pda...@gmail.com
>
> __
> R-help@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]]

__
R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see
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and provide commented, minimal, self-contained, reproducible code.

Re: [R] Import selected columns from sas7bdat file

[peter dalgaard]

I had a look at this a while back and it didn't seem to be easy. The path of 
least resistance would seem to be to use SAS itself to create a data set with 
fewer columns, but of course that requires you to get access to SAS. 

Otherwise, I think you'd have to modify sas7bdat::read.sas7bdat to drop 
unselected columns. That function is pure R code, so it might not be quite as 
hard as it sounds.

Incidentally, do teach your mailer to not send plain text. It is not much of a 
problem this time, but HTML mails can become quite unreadable on the list.


-pd


> On 10 Aug 2017, at 12:24 , Utkarsh Singhal  wrote:
> 
> Hello everyone,
> 
> I want to import data from huge sas files with 100s of columns. The good
> thing is that I am only interested in a few selected columns. Is there any
> way to do that without loading the full dataset.
> 
> I have tried two functions: (1) read.sas7bdat *[from library 'sas7bdat']*,
> and (2) read_sas *[from library 'haven']. *But couldn't find what I am
> looking for.
> 
> Best regards,
> Utkarsh Singhal
> 91.96508.54333
> 
>   [[alternative HTML version deleted]]
> 
> __
> R-help@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.

-- 
Peter Dalgaard, Professor,
Center for Statistics, Copenhagen Business School
Solbjerg Plads 3, 2000 Frederiksberg, Denmark
Phone: (+45)38153501
Office: A 4.23
Email: pd@cbs.dk  Priv: pda...@gmail.com

__
R-help@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.

[R] Import selected columns from sas7bdat file

[Utkarsh Singhal]

Hello everyone,

I want to import data from huge sas files with 100s of columns. The good
thing is that I am only interested in a few selected columns. Is there any
way to do that without loading the full dataset.

I have tried two functions: (1) read.sas7bdat *[from library 'sas7bdat']*,
and (2) read_sas *[from library 'haven']. *But couldn't find what I am
looking for.

Best regards,
Utkarsh Singhal
91.96508.54333

[[alternative HTML version deleted]]

__
R-help@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.