knitr / printr prints out whole table when update by reference is used

[ghost]

library(data.table)

data(mtcars)
df = data.table(mtcars)

library printr: https://github.com/yihui/printr

has issue with data.table.

this works in data.table 1.9.5, no intention to print/head table:

df[, mpg2 := mpg * 2]

but after loading printr, update by reference prints out the whole table.

the same thing happens without loading printr in data.table 1.9.4.

library(printr)
df[, mpg3 := mpg2 / 2]

the [verbose] solution for the moment:

# in data.table 1.9.4 even without printr OR
# in data.table 1.9.5 with printr:
df = df[, mpg4 := mpg3 * 2]

# doesn't print out the whole table

sessionInfo()

R version 3.1.2 (2014-10-31)
Platform: x86_64-pc-linux-gnu (64-bit)

locale:
[1] LC_CTYPE=en_US.UTF-8 LC_NUMERIC=C
[3] LC_TIME=nl_NL.UTF-8 LC_COLLATE=en_US.UTF-8
[5] LC_MONETARY=nl_NL.UTF-8 LC_MESSAGES=en_US.UTF-8
[7] LC_PAPER=nl_NL.UTF-8 LC_NAME=C
[9] LC_ADDRESS=C LC_TELEPHONE=C
[11] LC_MEASUREMENT=nl_NL.UTF-8 LC_IDENTIFICATION=C

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

other attached packages:
[1] printr_0.0.4 data.table_1.9.5

loaded via a namespace (and not attached):
[1] chron_2.3-47 digest_0.6.8 evaluate_0.7.2 highr_0.5
[5] htmltools_0.2.6 knitr_1.11 magrittr_1.5 rmarkdown_0.7
[9] stringi_0.5-5 stringr_1.0.0 tools_3.1.2 yaml_2.1.13

[arunsrinivasan]

printr doesn't seem to be on CRAN. Is this reproducible using 1.9.7 with knitr as well?

[ghost]

yes, same issue on 1.9.6 and 1.9.7.
printr is on github, see link above; library printr: https://github.com/yihui/printr, and is prints nice tables in markdown. check http://yihui.name/printr/.

[jangorecki]

Not able to reproduce on recent master and printr 0.1 from CRAN. Please report if it is still an issue for you.