我知道还有另一个问题可以解决,但我找不到它。
我想在R中使用time_1 <- list.files()
,稍后我time_2 <- list.files()
知道哪些是新的,以及哪些(如果以前在其中)是自time_1
之后更新的。
有人知道此函数的名称或如何执行任务吗?
(最终,我将检查这些文件的时间戳,但这也许超出了这个问题。)
> sessionInfo()
R version 3.3.2 (2016-10-31)
Platform: x86_64-redhat-linux-gnu (64-bit)
Running under: Amazon Linux AMI 2016.09
locale:
[1] LC_CTYPE=en_US.UTF-8 LC_NUMERIC=C LC_TIME=en_US.UTF-8 LC_COLLATE=en_US.UTF-8 LC_MONETARY=en_US.UTF-8
[6] LC_MESSAGES=en_US.UTF-8 LC_PAPER=en_US.UTF-8 LC_NAME=C LC_ADDRESS=C LC_TELEPHONE=C
[11] LC_MEASUREMENT=en_US.UTF-8 LC_IDENTIFICATION=C
attached base packages:
[1] stats graphics grDevices utils datasets methods base
other attached packages:
[1] forecast_8.0 tidyr_0.6.1 highcharter_0.5.0 DT_0.2 dplyr_0.5.0 lubridate_1.6.0 jsonlite_1.3 shinythemes_1.1.1
[9] ggthemes_3.4.0 ggfortify_0.4.1 ggplot2_2.2.1 shiny_1.0.1
loaded via a namespace (and not attached):
[1] Rcpp_0.12.10 plyr_1.8.4 tseries_0.10-38 xts_0.9-7 tools_3.3.2 digest_0.6.12 tibble_1.3.0 gtable_0.2.0
[9] nlme_3.1-128 lattice_0.20-34 igraph_1.0.1 psych_1.7.3.21 DBI_0.6-1 yaml_2.1.14 parallel_3.3.2 gridExtra_2.2.1
[17] stringr_1.2.0 htmlwidgets_0.8 lmtest_0.9-35 nnet_7.3-12 grid_3.3.2 data.table_1.10.4 R6_2.2.0 foreign_0.8-67
[25] TTR_0.23-1 purrr_0.2.2 reshape2_1.4.2 magrittr_1.5 scales_0.4.1 htmltools_0.3.5 rlist_0.4.6.1 quantmod_0.4-7
[33] assertthat_0.1 mnormt_1.5-5 timeDate_3012.100 mime_0.5 xtable_1.8-2 colorspace_1.3-2 fracdiff_1.4-2 httpuv_1.3.3
[41] quadprog_1.5-5 stringi_1.1.3 lazyeval_0.2.0 munsell_0.4.3 broom_0.4.2 zoo_1.7-14
> version
_
platform x86_64-redhat-linux-gnu
arch x86_64
os linux-gnu
system x86_64, linux-gnu
status
major 3
minor 3.2
year 2016
month 10
day 31
svn rev 71607
language R
version.string R version 3.3.2 (2016-10-31)
nickname Sincere Pumpkin Patch
最佳答案
目标:
看起来它包含在基本软件包utils中。参见?fileSnapshot
和?changedFiles
:
关于r - R中的list.files()并检查哪些不同/新,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/43264917/