[R] How to disable verbose grob results in pdf when using knitr with gridExtra?

[Jeff Newmiller]

On Sat, 11 Feb 2017, vod vos wrote:

> Hi every one,
>
> I am using Knitr,

Keep in mind that this list is about R first and foremost. There is a 
mailing list for Knitr, and also the maintainer of the knitr package 
recommends asking questions on stackoverflow.com.

> R and Latex to produce pdf file. When using gridExtra to set up a
> gtable layout to place multiple grobs on a page,
>
> grid.arrange(facetpoint1,pright1,pright2,pright3,pright4,pright5,pright6,pright7, ncol=2, layout_matrix=cbind(c(1,1,1,1,1,1,1),c(2,3,4,5,6,7,8)), widths=c(2,1))

This is not a reproducible example. No matter where you ask this question 
you need to supply a complete short script that exhibits the problem. That 
also means including enough data IN THE SCRIPT to allow the script to 
run. There are multiple guides online that describe how to do this in 
detail.

> the verbose of the infomation shows before the one figure in the pdf file:
>
> ## TableGrob (7 x 2) "arrange": 8 grobs ## z cells name grob ## 1 1 (1-7,1-1) arrange gtable[layout] ## 2 2 (1-1,2-2) arrange gtable[layout] ## 3 3 (2-2,2-2) arrange gtable[layout] ## 4 4 (3-3,2-2) arrange gtable[layout] ## 5 5 (4-4,2-2) arrange gtable[layout] ## 6 6 (5-5,2-2) arrange gtable[layout] ## 7 7 (6-6,2-2) arrange gtable[layout] ## 8 8 (7-7,2-2) arrange gtable[layout]

None of this appears when I created my own reproducible R example:

#### begin code
library(grid)
library(gridExtra)

facetpoint1 <- pright1 <- pright2 <- pright3 <- pright4 <- pright5 <- 
pright6 <- pright7  <- textGrob("X")
grid.arrange( facetpoint1, pright1, pright2, pright3, pright4, pright5
             , pright6, pright7
             , ncol=2
             , layout_matrix = cbind( c( 1, 1, 1, 1, 1, 1, 1 )
                                    , c( 2, 3, 4, 5, 6, 7, 8 ) )
             , widths = c( 2, 1 )
             )
#### end code

If the above example produces output for you in R or in a knitted PDF then 
something is different about your setup than mine.

> When I ?grid.arrange, no ways were found to disable the verbose in the pdf file. Any ideas?

Does this happen at the R console? If it does, please post a reproducible 
example, and the invocation and output of sessionInfo() (mine is below). 
If it doesn't, there could be some interaction with knitr going on, and 
using the echo=FALSE or warnings=FALSE chunk options could help, or you 
may need more specialized help than we can offer here (e.g. via one of 
the knitr support areas mentioned above).

> Thanks.
>
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> sessionInfo()
R version 3.3.2 (2016-10-31)
Platform: x86_64-pc-linux-gnu (64-bit)
Running under: Ubuntu 14.04.5 LTS

locale:
  [1] LC_CTYPE=en_US.UTF-8       LC_NUMERIC=C 
LC_TIME=en_US.UTF-8
  [4] LC_COLLATE=en_US.UTF-8     LC_MONETARY=en_US.UTF-8 
LC_MESSAGES=en_US.UTF-8
  [7] LC_PAPER=en_US.UTF-8       LC_NAME=C                  LC_ADDRESS=C
[10] LC_TELEPHONE=C             LC_MEASUREMENT=en_US.UTF-8 
LC_IDENTIFICATION=C

attached base packages:
[1] grid      stats     graphics  grDevices utils     datasets  methods 
base

other attached packages:
[1] gridExtra_2.2.1

loaded via a namespace (and not attached):
  [1] backports_1.0.4 magrittr_1.5    rprojroot_1.1   htmltools_0.3.5 
tools_3.3.2
  [6] gtable_0.2.0    yaml_2.1.14     Rcpp_0.12.8     stringi_1.1.2 
rmarkdown_1.3
[11] knitr_1.15.1    stringr_1.1.0   digest_0.6.11   evaluate_0.10