我正在尝试获取一个简单的OpenCPU应用程序(来自https://www.opencpu.org/download.html)。
由于我在AWS上使用Ubuntu,我按照Ubuntu的说明进行操作:
# Requires Ubuntu 14.04 (Trusty) or 16.04 (Xenial)
sudo add-apt-repository -y ppa:opencpu/opencpu-1.6
sudo apt-get update
sudo apt-get upgrade
# Installs OpenCPU server
sudo apt-get install -y opencpu
# Done! Open http://yourhost/ocpu in your browser
# Optional: installs rstudio in http://yourhost/rstudio
sudo apt-get install -y rstudio-server
顺利通过。
接下来,我尝试在Rstudio中安装软件包:
install.packages("opencpu")
Installing package into ‘/home/ruser/R/x86_64-pc-linux-gnu-library/3.3’
(as ‘lib’ is unspecified)
trying URL 'https://cran.rstudio.com/src/contrib/opencpu_1.6.1.tar.gz'
Content type 'unknown' length 563159 bytes (549 KB)
==================================================
downloaded 549 KB
* installing *source* package ‘opencpu’ ...
** package ‘opencpu’ successfully unpacked and MD5 sums checked
** R
** inst
** preparing package for lazy loading
** help
*** installing help indices
** building package indices
** installing vignettes
** testing if installed package can be loaded
* DONE (opencpu)
The downloaded source packages are in
‘/tmp/RtmpON3Ujv/downloaded_packages’
> library(opencpu)
Initiating OpenCPU server...
Using config: /home/ruser/.opencpu.conf
OpenCPU started.
[httpuv] http://myserver/rstudio/p/1529/ocpu
Error : .onAttach failed in attachNamespace() for 'opencpu', details:
call: rhttpd$init()
error: could not find function "startDynamicHelp"
Error: package or namespace load failed for ‘opencpu’
这是我收到错误的地方。尝试谷歌搜索错误,但没有运气。
答案 0 :(得分:0)
@gaurav是对的。 opencpu上的说明非常容易让人误解,因为看起来它们显示的是一组指令,但事实上,R命令用于在交互式R会话中运行opencpu,而不是新安装的opencpu云服务器。
要在新的云服务器上运行示例应用程序(我假设您正在尝试这样做),您需要按照云服务器的说明进行操作。
以下是帮助我的云服务器文档的链接:
https://cran.r-project.org/web/packages/opencpu/vignettes/opencpu-server.pdf
具体来说,要运行示例应用程序,您需要以root身份启动R会话,并安装软件包:
sudo -i
R
#then from r session
library(devtools)
install_github("opencpu/gitstats")
install_github("opencpu/stocks")
#then quit
quit()
exit
然后重启opencpu服务:
sudo service opencpu restart
然后,您可以使用opencpu api导航到包。在Web浏览器中,转到:
http://localhost/ocpu/library/gitstats/www/
并且瞧 -