我不时遇到这种情况,但这是我第一次有简单的可重复的例子。事实上,这个例子涉及rubridate,我相信是巧合的。在R --vanilla会议
library(lubridate)
ymd("2001-02-02")
# [1] "2001-02-02 UTC"
# so far so good
debug(ymd)
ymd("2001-02-02")
# debugging in: ymd("2001-02-02")
# Error in ymd("2001-02-02") : could not find function ".parse_xxx"
ymd没有任何问题,我试图学习一些东西。但是当你实际调试时会发生这种情况,这很烦人。调试器错误或我错过了什么?
版本信息
> R.version
_
platform x86_64-apple-darwin13.4.0
arch x86_64
os darwin13.4.0
system x86_64, darwin13.4.0
status
major 3
minor 1.2
year 2014
month 10
day 31
svn rev 66913
language R
version.string R version 3.1.2 (2014-10-31)
nickname Pumpkin Helmet
and session infor per @Joshua Urlich评论
> sessionInfo()
R version 3.1.2 (2014-10-31)
Platform: x86_64-apple-darwin13.4.0 (64-bit)
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] lubridate_1.3.3
loaded via a namespace (and not attached):
[1] digest_0.6.4 memoise_0.2.1 plyr_1.8.1 Rcpp_0.11.3 stringr_0.6.2
由于
答案 0 :(得分:4)
看起来可能与使用{}
未定义的功能有关。目前的实施是:
ymd <- function(..., quiet = FALSE, tz = "UTC", locale = Sys.getlocale("LC_TIME"), truncated = 0)
.parse_xxx(..., orders = "ymd", quiet = quiet, tz = tz, locale = locale, truncated = truncated)
如果我解压缩源代码并将实现更改为:
,则debug
尝试有效
ymd <- function(..., quiet = FALSE, tz = "UTC", locale = Sys.getlocale("LC_TIME"), truncated = 0)
{ .parse_xxx(..., orders = "ymd", quiet = quiet, tz = tz, locale = locale, truncated = truncated)}
在进行上述更改之前,我能够复制该问题。制作完成后,我得到:
> require(lubridate); debug(ymd); ymd("2015-01-01")
Loading required package: lubridate
debugging in: ymd("2015-01-01")
debug: {
.parse_xxx(..., orders = "ymd", quiet = quiet, tz = tz, locale = locale,
truncated = truncated)
}
Browse[2]>
debug: .parse_xxx(..., orders = "ymd", quiet = quiet, tz = tz, locale = locale,
truncated = truncated)
Browse[2]>
exiting from: ymd("2015-01-01")
[1] "2015-01-01 UTC"
答案 1 :(得分:3)
不是解决方案或解释,而是潜在的解决方法:
trace(ymd, browser)
然后:
> ymd("2001-02-02")
Tracing ymd("2001-02-02") on entry
Called from: eval(expr, envir, enclos)
Browse[1]> n
debug: .parse_xxx(..., orders = "ymd", quiet = quiet, tz = tz, locale = locale,
truncated = truncated)
Browse[2]>
我可以在Win7 R3.1.2 / RStudio上重新创建错误。我希望用trace
重新创建问题以试图解决问题,但该函数的任何trace
都会破坏问题......