为什么包 'epicalc' 从 CRAN 中删除？
Why was package 'epicalc' removed from CRAN?
转到 link：
https://cran.r-project.org/web/packages/epicalc/index.html
您将收到消息：
Package ‘epicalc’ was removed from the CRAN repository.
Formerly available versions can be obtained from the archive.
Archived on 2015-05-12 as requested by the maintainer <cvirasak@medicine.psu.ac.th>.
但没有给出进一步的解释。这似乎是一个开发完善且有用的软件包，那么为什么将其删除？
看起来 epicalc 中的大部分 material 已移至 epiDisplay。
epiDisplay package information 说：
Package for data exploration and result presentation. Full 'epicalc' package with data management functions is available at the author's repository.
（虽然它没有给出 link）。
devtools::install_version("epicalc",version="2.15.1.0")
install.packages("epiDisplay")
library("epicalc")
library("epiDisplay")
c1 <- ls("package:epicalc")
d1 <- ls("package:epiDisplay")
在 epicalc 但不在 epiDisplay:
setdiff(c1,d1)
## [1] "addMissingRecords" "adjust" "auc"
## [4] "be2ad" "detachAllData" "expand"
## [7] "fillin" "keepData" "label.var"
## [10] "lagVar" "markVisits" "merge.lab"
## [13] "pack" "print.summ" "recode"
## [16] "recode.default" "recode.is.na" "ren"
## [19] "rename" "rename.default" "rename.pattern"
## [22] "rename.var" "sortBy" "tally.events"
## [25] "unclassDataframe" "use" "zap"
在 epiDisplay 但不在 epicalc:
setdiff(d1,c1)
## [1] "print.summ.data.frame" "print.summ.default" "summ.data.frame"
## [4] "summ.default" "summ.factor" "summ.logical"
编辑：
‘epicalc’ has disappeared from CRAN. It has been archived by R-core team based on my request. The reason is that CRAN has set up a policy not to allow any package to do anything on .GlobalEnv while epicalc does that extensively.
他们接着说：
WHICH ONE IS BETTER? ‘epicalc’ or ‘epiDisplay’
For those who are familiar with epicalc, without these database functions, you need to get back to usual plain R functions. That will slow you down substantially, especially during the data cleaning and manipulation. I recommend that you should install epicalc from our website (as shown above) and don’t borther about ‘epiDisplay’ For R users who have never used epicalc and do not want to learn epicalc database functions, ‘epiDisplay’ is straightforward and should still be very useful in data exploration and result display.
转到 link：
https://cran.r-project.org/web/packages/epicalc/index.html
您将收到消息：
Package ‘epicalc’ was removed from the CRAN repository.
Formerly available versions can be obtained from the archive.
Archived on 2015-05-12 as requested by the maintainer <cvirasak@medicine.psu.ac.th>.
但没有给出进一步的解释。这似乎是一个开发完善且有用的软件包，那么为什么将其删除？
看起来 epicalc 中的大部分 material 已移至 epiDisplay。
epiDisplay package information 说：
Package for data exploration and result presentation. Full 'epicalc' package with data management functions is available at the author's repository.
（虽然它没有给出 link）。
devtools::install_version("epicalc",version="2.15.1.0")
install.packages("epiDisplay")
library("epicalc")
library("epiDisplay")
c1 <- ls("package:epicalc")
d1 <- ls("package:epiDisplay")
在 epicalc 但不在 epiDisplay:
setdiff(c1,d1)
## [1] "addMissingRecords" "adjust" "auc"
## [4] "be2ad" "detachAllData" "expand"
## [7] "fillin" "keepData" "label.var"
## [10] "lagVar" "markVisits" "merge.lab"
## [13] "pack" "print.summ" "recode"
## [16] "recode.default" "recode.is.na" "ren"
## [19] "rename" "rename.default" "rename.pattern"
## [22] "rename.var" "sortBy" "tally.events"
## [25] "unclassDataframe" "use" "zap"
在 epiDisplay 但不在 epicalc:
setdiff(d1,c1)
## [1] "print.summ.data.frame" "print.summ.default" "summ.data.frame"
## [4] "summ.default" "summ.factor" "summ.logical"
编辑：
‘epicalc’ has disappeared from CRAN. It has been archived by R-core team based on my request. The reason is that CRAN has set up a policy not to allow any package to do anything on .GlobalEnv while epicalc does that extensively.
他们接着说：
WHICH ONE IS BETTER? ‘epicalc’ or ‘epiDisplay’
For those who are familiar with epicalc, without these database functions, you need to get back to usual plain R functions. That will slow you down substantially, especially during the data cleaning and manipulation. I recommend that you should install epicalc from our website (as shown above) and don’t borther about ‘epiDisplay’ For R users who have never used epicalc and do not want to learn epicalc database functions, ‘epiDisplay’ is straightforward and should still be very useful in data exploration and result display.