在做Multivariate kernel density estimation
用到R語言的ks包，在ubuntu下（R studio）安裝遇到了問題：
> install.packages("ks") Installing package into ‘/home/coolwaterld/R/i686-pc-linux-gnu-library/3.0’ (as ‘lib’ is unspecified) also installing the dependency ‘rgl’ trying URL 'http://cran.rstudio.com/src/contrib/rgl_0.95.1158.tar.gz' Content type 'application/x-gzip' length 1783656 bytes (1.7 Mb) opened URL ================================================== downloaded 1.7 Mb trying URL 'http://cran.rstudio.com/src/contrib/ks_1.9.3.tar.gz' Content type 'application/x-gzip' length 308363 bytes (301 Kb) opened URL ================================================== downloaded 301 Kb * installing *source* package ‘rgl’ ... ** package ‘rgl’ successfully unpacked and MD5 sums checked checking for gcc... gcc -std=gnu99 checking whether the C compiler works... yes checking for C compiler default output file name... a.out checking for suffix of executables... checking whether we are cross compiling... no checking for suffix of object files... o checking whether we are using the GNU C compiler... yes checking whether gcc -std=gnu99 accepts -g... yes checking for gcc -std=gnu99 option to accept ISO C89... none needed checking how to run the C preprocessor... gcc -std=gnu99 -E checking for gcc... (cached) gcc -std=gnu99 checking whether we are using the GNU C compiler... (cached) yes checking whether gcc -std=gnu99 accepts -g... (cached) yes checking for gcc -std=gnu99 option to accept ISO C89... (cached) none needed checking whether __attribute__((visibility())) is supported... yes checking whether gcc -std=gnu99 accepts -fvisibility... yes checking whether accepts -fvisibility... no checking for libpng-config... yes configure: using libpng-config configure: using libpng dynamic linkage checking for X... no configure: error: X11 not found but required, configure aborted. ERROR: configuration failed for package ‘rgl’ * removing ‘/home/coolwaterld/R/i686-pc-linux-gnu-library/3.0/rgl’ Warning in install.packages : installation of package ‘rgl’ had non-zero exit status ERROR: dependency ‘rgl’ is not available for package ‘ks’ * removing ‘/home/coolwaterld/R/i686-pc-linux-gnu-library/3.0/ks’ Warning in install.packages : installation of package ‘ks’ had non-zero exit status The downloaded source packages are in ‘/tmp/Rtmp2FbviI/downloaded_packages’
發現爲rgl包的問題，可以在終端中安裝rgl
sudo apt-get install r-cran-rgl再次安裝ks包
> install.packages("ks") Installing package into ‘/home/coolwaterld/R/i686-pc-linux-gnu-library/3.0’ (as ‘lib’ is unspecified) trying URL 'http://cran.rstudio.com/src/contrib/ks_1.9.3.tar.gz' Content type 'application/x-gzip' length 308363 bytes (301 Kb) opened URL ================================================== downloaded 301 Kb * installing *source* package ‘ks’ ... ** package ‘ks’ successfully unpacked and MD5 sums checked ** libs gcc -std=gnu99 -I/usr/share/R/include -DNDEBUG -fpic -O3 -pipe -g -c ks.c -o ks.o gcc -std=gnu99 -shared -o ks.so ks.o -L/usr/lib/R/lib -lR installing to /home/coolwaterld/R/i686-pc-linux-gnu-library/3.0/ks/libs ** R ** data ** inst ** preparing package for lazy loading ** help *** installing help indices ** building package indices ** installing vignettes ** testing if installed package can be loaded * DONE (ks) The downloaded source packages are in ‘/tmp/Rtmp2FbviI/downloaded_packages’成功
參考：http://ubuntuforums.org/showthread.php?t=787464
