Not printed out this data.table when I not wanted

[JBreidaks]

library(data.table) #version 1.9.4
estim <- data.table(aa=c(1,2,3), vvat1at=c(1,5,16))
checked=TRUE

If had some check and it is TRUE, then in variable estim create new variable a with value 1.

if (checked) estim[, a:=1] 

But automatically printed out data.table.

#      aa  vat1at    a
#1:   1       1     1
#2:   2       5     1
#3:   3      16     1

Can some something to do that not printed out this data.table when I not wanted?

[JBreidaks]

library(data.table) version 1.9.4 data <- data.table(v=c(2,2,3))

data[v<1, v:=3]

If checking is FALSE, then print out all data.table.

[arunsrinivasan]

It's very hard to understand what you're trying to say here. I'm guessing it's about automatic printing when using :=?

[mattdowle]

Yes. It's a follow up from off list with me. I been struggling with it for a while but think there's a reasonable solution that fixes the knitr printing issue as well ...

[ywhcuhk]

It still prints for DT[, LHS := RHS]. I installed the develop version following the instruction:

library(devtools)
install_github("Rdatatable/data.table", build_vignettes = FALSE)

My system info:

platform       x86_64-apple-darwin13.4.0   
arch           x86_64                      
os             darwin13.4.0                
system         x86_64, darwin13.4.0        
status                                     
major          3                           
minor          2.0                         
year           2015                        
month          04                          
day            16                          
svn rev        68180                       
language       R                           
version.string R version 3.2.0 (2015-04-16)
nickname       Full of Ingredients   

[shrektan]

It's fine in my Mac and win7.

Can you provide the session info?

发自我的 iPhone

在 2015年8月3日，12:02，Wenhao Yang notifications@github.com 写道：

It still prints for DT[, LHS := RHS]. I installed the develop version following the instruction:

library(devtools)
install_github("Rdatatable/data.table", build_vignettes = FALSE)
My system info:

platform x86_64-apple-darwin13.4.0
arch x86_64
os darwin13.4.0
system x86_64, darwin13.4.0
status
major 3
minor 2.0
year 2015
month 04
day 16
svn rev 68180
language R
version.string R version 3.2.0 (2015-04-16)
nickname Full of Ingredients
—
Reply to this email directly or view it on GitHub.

[ywhcuhk]

Session Info

R version 3.2.0 (2015-04-16)
Platform: x86_64-apple-darwin13.4.0 (64-bit)
Running under: OS X 10.10.4 (Yosemite)

locale:
[1] en_US.UTF-8/en_US.UTF-8/en_US.UTF-8/C/en_US.UTF-8/en_US.UTF-8

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

other attached packages:
[1] xtable_1.7-4     lubridate_1.3.3  dplyr_0.4.2      data.table_1.9.5

loaded via a namespace (and not attached):
 [1] Rcpp_0.11.6.1   digest_0.6.8    assertthat_0.1  chron_2.3-47    R6_2.0.1       
 [6] plyr_1.8.1      DBI_0.3.1.9008  magrittr_1.5    stringi_0.4-1   lazyeval_0.1.10
[11] tools_3.2.0     stringr_1.0.0   parallel_3.2.0  memoise_0.2.1  

[shrektan]

I reinstall the package and test the code below. It's perfectly fine. So, I have no idea.

I suggest you close all the R sessions, reinstall the package, and execute the code below.

library(data.table)
tmp <- data.table(a = 1:4)
tmp[, b := 1:4]