下午好。最近我遇到了安装"；mxnet"；包裹我已经尝试了几种代码变体，但它们都没有真正安装这个包。
1.
cran <- getOption("repos")
cran["dmlc"] <- "https://apache-mxnet.s3-accelerate.dualstack.amazonaws.com/R/CRAN/15"
options(repos = cran)
install.packages("mxnet")
library(mxnet)
得到这样的错误：
错误："mxnet"的包或命名空间加载失败：包"mxnet在R 4.0.0之前安装：请重新安装
install.packages("https://github.com/jeremiedb/mxnet_winbin/raw/master/mxnet.zip", repos = NULL)
然后我键入library(mxnet)，并得到第1页中的错误消息。
3.
cran <- getOption("repos")
cran["dmlc"] <- "https://apache-mxnet.s3-accelerate.dualstack.amazonaws.com/R/CRAN/23"
options(repos = cran)
library(devtools)
require(devtools)
install_version("DiagrammeR", version = "0.9.0", repos = "http://cran.us.r-project.org")
require(DiagrammeR)
install.packages("mxnet")
library(mxnet)
执行此代码后，我得到以下错误：
ERROR: failed to lock directory 'C:/Users/user/Documents/R/win-library/4.0' for modifying
Try removing 'C:/Users/user/Documents/R/win-library/4.0/00LOCK-rlang'
Error: Failed to install 'unknown package' from URL:
(converted from warning) installation of package ‘rlang’ had non-zero exit status
> install.packages("mxnet")
Warning in install.packages :
cannot open URL 'https://apache-mxnet.s3-accelerate.dualstack.amazonaws.com/R/CRAN/23/src/contrib/PACKAGES.rds': HTTP status was '404 Not Found'
Warning in install.packages :
cannot open URL 'https://apache-mxnet.s3-accelerate.dualstack.amazonaws.com/R/CRAN/23/src/contrib/PACKAGES.gz': HTTP status was '404 Not Found'
Warning in install.packages :
cannot open URL 'https://apache-mxnet.s3-accelerate.dualstack.amazonaws.com/R/CRAN/23/src/contrib/PACKAGES': HTTP status was '404 Not Found'
Warning in install.packages :
unable to access index for repository https://apache-mxnet.s3-accelerate.dualstack.amazonaws.com/R/CRAN/23/src/contrib:
cannot open URL 'https://apache-mxnet.s3-accelerate.dualstack.amazonaws.com/R/CRAN/23/src/contrib/PACKAGES'
Installing package into ‘C:/Users/user/Documents/R/win-library/4.0’
(as ‘lib’ is unspecified)
Warning in install.packages :
cannot open URL 'https://apache-mxnet.s3-accelerate.dualstack.amazonaws.com/R/CRAN/23/src/contrib/PACKAGES.rds': HTTP status was '404 Not Found'
Warning in install.packages :
cannot open URL 'https://apache-mxnet.s3-accelerate.dualstack.amazonaws.com/R/CRAN/23/src/contrib/PACKAGES.gz': HTTP status was '404 Not Found'
Warning in install.packages :
cannot open URL 'https://apache-mxnet.s3-accelerate.dualstack.amazonaws.com/R/CRAN/23/src/contrib/PACKAGES': HTTP status was '404 Not Found'
Warning in install.packages :
unable to access index for repository https://apache-mxnet.s3-accelerate.dualstack.amazonaws.com/R/CRAN/23/src/contrib:
cannot open URL 'https://apache-mxnet.s3-accelerate.dualstack.amazonaws.com/R/CRAN/23/src/contrib/PACKAGES'
Warning in install.packages :
package ‘mxnet’ is not available (for R version 4.0.2)
Warning in install.packages :
cannot open URL 'https://apache-mxnet.s3-accelerate.dualstack.amazonaws.com/R/CRAN/23/bin/windows/contrib/4.0/PACKAGES.rds': HTTP status was '404 Not Found'
Warning in install.packages :
cannot open URL 'https://apache-mxnet.s3-accelerate.dualstack.amazonaws.com/R/CRAN/23/bin/windows/contrib/4.0/PACKAGES.gz': HTTP status was '404 Not Found'
Warning in install.packages :
cannot open URL 'https://apache-mxnet.s3-accelerate.dualstack.amazonaws.com/R/CRAN/23/bin/windows/contrib/4.0/PACKAGES': HTTP status was '404 Not Found'
Warning in install.packages :
unable to access index for repository https://apache-mxnet.s3-accelerate.dualstack.amazonaws.com/R/CRAN/23/bin/windows/contrib/4.0:
cannot open URL 'https://apache-mxnet.s3-accelerate.dualstack.amazonaws.com/R/CRAN/23/bin/windows/contrib/4.0/PACKAGES'
最后，mxnet包还没有安装在RStudio中。
我已经熟悉了R中的MXNet软件包安装，但那里给出的一些说明并没有带来任何帮助。其他与我的代码一致。
您能告诉我如何成功安装此软件包吗？我应该运行什么代码？
谢谢你的努力。
由于您正在使用的R版本没有预构建的MXNet二进制文件，因此您需要遵循从源代码构建的说明。请参阅https://mxnet.apache.org/versions/1.7.0/get_started/build_from_source
您可以按照这些说明进行操作，但如果愿意，可以使用1.8.0rc2版本档案，而不是1.7.0。
此问题与R重复："mxnet"的命名空间加载失败：包"mxnet'是在R 4.0.0之前安装的：请重新安装，但不能标记为重复，因为没有可接受的答案。