错误：无法加载刚才安装的包

当我尝试在 Eclipse 中运行 R 控制台时，出现以下错误：

....Please make sure that R package 'rj' (1.1 or compatible) is installed...

所以我尝试将它安装在 R 控制台中，如下所示：

install.packages(c("rj", "rj.gd"), repos="http://download.walware.de/rj-1.1")

并得到这个错误：

 ** testing if installed package can be loaded
 Error : .onLoad failed in loadNamespace() for 'rj.gd', details:
 call: dyn.load(file, DLLpath = DLLpath, ...)
 error: unable to load shared object '/home/alex/R/x86_64-pc-linux-gnu-library/2.15/rj.gd/libs/rj.gd.so':
 libjvm.so: cannot open shared object file: No such file or directory
 Error: loading failed
 Execution halted
 ERROR: loading failed

我发现在安装 rJava 时使用：install.packages("rJava")得到类似的错误：

** testing if installed package can be loaded
Error : .onLoad failed in loadNamespace() for 'rJava', details:
call: dyn.load(file, DLLpath = DLLpath, ...)
error: unable to load shared object '/home/alex/R/x86_64-pc-linux-gnu-library/2.15/rJava/libs/rJava.so':
libjvm.so: cannot open shared object file: No such file or directory
Error: loading failed
Execution halted
ERROR: loading failed

当我跑步时sudo R CMD javareconf，我得到这个输出：

Java interpreter : /usr/bin/java
Java version     : 1.7.0
Java home path   : /usr/lib/jvm/java-7-oracle/jre
Java compiler    : /usr/bin/javac
Java headers gen.: /usr/bin/javah
Java archive tool: /usr/bin/jar
NOTE: Your JVM has a bogus java.library.path system property!
Trying a heuristic via sun.boot.library.path to find jvm library...
Java library path: $(JAVA_HOME)/lib/amd64:$(JAVA_HOME)/lib/amd64/server
JNI linker flags : -L$(JAVA_HOME)/lib/amd64 -L$(JAVA_HOME)/lib/amd64/server -ljvm
JNI cpp flags    : -I$(JAVA_HOME)/../include -I$(JAVA_HOME)/../include/linux

Updating Java configuration in /etc/R
Done.

顺便说一句，我的配置是：

Ubuntu 11.10 64bit
Eclipse 3.7
Oracle-1.7-jdk
R version 2.15.1 

对于 Linux(Ubuntu) 用户：如果您有Oracle-Java (7/8) http://www.webupd8.org/2012/09/install-oracle-java-8-in-ubuntu-via-ppa.html安装。它将在这个位置/usr/lib/jvm and sudo需要访问权限。

创建文件/etc/ld.so.conf.d/java.conf包含以下条目：

/usr/lib/jvm/java-8-oracle/jre/lib/amd64
/usr/lib/jvm/java-8-oracle/jre/lib/amd64/server

（根据您的java版本，将java-8-oracle替换为java-7-oracle）

Then:

sudo ldconfig

重新启动 RStudio，然后安装 rJava 包。

OR

另一种方法是导出LD_LIBRARY_PATH与从命令中获取的Java库路径的值R CMD javareconf -e并运行install.packages