Re: [R] read.xlsx function crashing R Studio

2016-08-29 Thread Rainer Hurling 
Hi Kevin,

Am 21.08.2016 um 19:30 schrieb Kevin Kowitski:
> Hey everyone, 
> 
>I have used read.xlsx in the past rather than XLConnect for importing
> Excel data to R.  However, I have been finding now that the read.xlsx
> function has been causing my R studio to Time out.  I thought it might
> be because the R studio I had was out of date so I installed R studio
> X64 3.3.1 and reinstalled the xlsx package but it is still failing.  I
> have been trying to use XLConnect in it's place which has been working,
> excpet that I am running into memory error:
>   Error: OutOfMemoryError (Java): GC overhead limit exceeded
>   
> I did some online searching and found an option to increase memory:
>   "options(java.parameters = "-Xmx4g" )
> 
> but it resulted in this new memory Error:
> 
>  Error: OutOfMemoryError (Java): Java heap space
> 
> Can anyone provide me with some help on getting the read.xlsx function
> working?
> 
> -Kevin

There are interesting alternatives with other packages, as mentioned
before by Jim Holtman and Hadley Wickham.

If there are serious reasons to use the xlsx package, I had success with
the following, somewhat ugly workaround:


# Increase before package loading
options(java.parameters = "-Xmx8000m")
# Java garbage collection function
jgc <- function() .jcall("java/lang/System", method = "gc")
library(xlsx)
# if you like to use ISO dates
options(xlsx.date.format="-mm-dd")
# ATTENTION:  Loading of package xlsx changes decimal point
# to comma in a German locale
Sys.setlocale(category = "LC_NUMERIC", locale="C")  # UGLY HACK !!!


# Later in your code, i.e. before using addDataFrame(), use
jgc()


HTH,
Rainer Hurling

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Re: [R] read.xlsx function crashing R Studio

2016-08-22 Thread Hadley Wickham 
Or readxl.

Hadley

On Mon, Aug 22, 2016 at 5:54 AM, jim holtman  wrote:
> try the openxlsx package
>
>
> Jim Holtman
> Data Munger Guru
>
> What is the problem that you are trying to solve?
> Tell me what you want to do, not how you want to do it.
>
> On Sun, Aug 21, 2016 at 1:30 PM, Kevin Kowitski 
> wrote:
>
>> Hey everyone,
>>
>>I have used read.xlsx in the past rather than XLConnect for importing
>> Excel data to R.  However, I have been finding now that the read.xlsx
>> function has been causing my R studio to Time out.  I thought it might be
>> because the R studio I had was out of date so I installed R studio X64
>> 3.3.1 and reinstalled the xlsx package but it is still failing.  I have
>> been trying to use XLConnect in it's place which has been working, excpet
>> that I am running into memory error:
>>   Error: OutOfMemoryError (Java): GC overhead limit exceeded
>>
>> I did some online searching and found an option to increase memory:
>>   "options(java.parameters = "-Xmx4g" )
>>
>> but it resulted in this new memory Error:
>>
>>  Error: OutOfMemoryError (Java): Java heap space
>>
>> Can anyone provide me with some help on getting the read.xlsx function
>> working?
>>
>> -Kevin
>>
>> __
>> 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/posti
>> ng-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
> 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.



-- 
http://hadley.nz

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Re: [R] read.xlsx function crashing R Studio

2016-08-22 Thread jim holtman 
try the openxlsx package


Jim Holtman
Data Munger Guru

What is the problem that you are trying to solve?
Tell me what you want to do, not how you want to do it.

On Sun, Aug 21, 2016 at 1:30 PM, Kevin Kowitski 
wrote:

> Hey everyone,
>
>I have used read.xlsx in the past rather than XLConnect for importing
> Excel data to R.  However, I have been finding now that the read.xlsx
> function has been causing my R studio to Time out.  I thought it might be
> because the R studio I had was out of date so I installed R studio X64
> 3.3.1 and reinstalled the xlsx package but it is still failing.  I have
> been trying to use XLConnect in it's place which has been working, excpet
> that I am running into memory error:
>   Error: OutOfMemoryError (Java): GC overhead limit exceeded
>
> I did some online searching and found an option to increase memory:
>   "options(java.parameters = "-Xmx4g" )
>
> but it resulted in this new memory Error:
>
>  Error: OutOfMemoryError (Java): Java heap space
>
> Can anyone provide me with some help on getting the read.xlsx function
> working?
>
> -Kevin
>
> __
> 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/posti
> ng-guide.html
> and provide commented, minimal, self-contained, reproducible code.

[[alternative HTML version deleted]]

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[R] read.xlsx function crashing R Studio

2016-08-22 Thread Kevin Kowitski 

Hey everyone, 

   I have used read.xlsx in the past rather than XLConnect for importing Excel 
data to R.  However, I have been finding now that the read.xlsx function has 
been causing my R studio to Time out.  I thought it might be because the R 
studio I had was out of date so I installed R studio X64 3.3.1 and reinstalled 
the xlsx package but it is still failing.  I have been trying to use XLConnect 
in it's place which has been working, excpet that I am running into memory 
error:
  Error: OutOfMemoryError (Java): GC overhead limit exceeded
  
I did some online searching and found an option to increase memory:
  "options(java.parameters = "-Xmx4g" )

but it resulted in this new memory Error:

 Error: OutOfMemoryError (Java): Java heap space

Can anyone provide me with some help on getting the read.xlsx function working?

-Kevin

__
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.