R help - Feb 2015 - Pass additional arguments to do.call(grid.arrange, plots)

Hi R users,

I have a problem on how to pass an extra argument to do. call:

The example codes are:

#--------------------------------------------
require(ggplot2)
plots = lapply(1:5, function(.x) qplot(1:10,rnorm(10),
main=paste("plot",.x)))
require(gridExtra)
do.call(grid.arrange,  plots)
#---------------------------------------------

I want to force the composite figures into 2 rows by adding 'now = 2'
in the function 'grid.arrange'. How can I do it?
I searched on google but could not find a workable solution.

I am working on RStudio 0.98.1102 on OSX Yosemite 10.10.2.
Thanks a lot,
Bingzhang

-- 
Bingzhang Chen
Ph. D.,
State Key Lab of Marine Environmental Science,
College of Oceanography and Environmental Science,
Xiamen University,
Xiamen, Fujian 361005
P. R. China

On Feb 15, 2015, at 4:36 PM, Bingzhang Chen wrote:
> Hi R users,
> 
> I have a problem on how to pass an extra argument to do. call:
> 
> The example codes are:
> 
> #--------------------------------------------
> require(ggplot2)
> plots = lapply(1:5, function(.x) qplot(1:10,rnorm(10),
main=paste("plot",.x)))
> require(gridExtra)
> do.call(grid.arrange,  plots)
> #---------------------------------------------
> 
> I want to force the composite figures into 2 rows by adding 'now =
2'
> in the function 'grid.arrange'. How can I do it?
> I searched on google but could not find a workable solution.
Wouldn't it just be:

do.call(grid.arrange,  c(plots, nrow=2) )

-- David.
> 
> I am working on RStudio 0.98.1102 on OSX Yosemite 10.10.2.
> Thanks a lot,
> Bingzhang
> 
> -- 
> Bingzhang Chen
> Ph. D.,
> State Key Lab of Marine Environmental Science,
> College of Oceanography and Environmental Science,
> Xiamen University,
> Xiamen, Fujian 361005
> P. R. China
> 
> ______________________________________________
> R-help at r-project.org mailing list -- To UNSUBSCRIBE and more, see
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> PLEASE do read the posting guide
http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
David Winsemius
Alameda, CA, USA

On 16/02/15 13:36, Bingzhang Chen wrote:
> Hi R users,
>
> I have a problem on how to pass an extra argument to do. call:
>
> The example codes are:
>
> #--------------------------------------------
> require(ggplot2)
> plots = lapply(1:5, function(.x) qplot(1:10,rnorm(10),
main=paste("plot",.x)))
> require(gridExtra)
> do.call(grid.arrange,  plots)
> #---------------------------------------------
>
> I want to force the composite figures into 2 rows by adding 'now =
2'
    You mean 'nrow = 2', but I wasn't fooled for an instant! :-)
> in the function 'grid.arrange'. How can I do it?
> I searched on google but could not find a workable solution.
>
> I am working on RStudio 0.98.1102 on OSX Yosemite 10.10.2.
Try:

     do.call(grid.arrange,c(plots,list(nrow=2))

The second argument to do.call() consists of a list constituting the 
arguments to the first argument.  So just append the argument you want 
to use, to this list.  Easy, once you know. :-)

cheers,

Rolf Turner

P. S.  Thank you for providing a clear and reproducible example.

R. T.

-- 
Rolf Turner
Technical Editor ANZJS
Department of Statistics
University of Auckland
Phone: +64-9-373-7599 ext. 88276
Home phone: +64-9-480-4619