R中如何下载baidumap数据包

fish01

我现想用R绘制一个南海及周边国家的地图，需要用到baidumap数据包，但我安照先安装library(devtools)，成功安装，然后install_github('badbye/baidumap')，一直不能成功安装，请教怎样做？

fish01

具体情况如下：
> devtools::install_github("GastonMauroDiaz/caiman")
Downloading GitHub repo GastonMauroDiaz/caiman@master
from URL https://api.github.com/repos/Gas ... iman/zipball/master
Installing caiman
"E:/R-3.2.1/bin/x64/R" --no-site-file --no-environ --no-save --no-restore  \
  --quiet CMD INSTALL  \
  "C:/Users/liu/AppData/Local/Temp/RtmpaaTypR/devtools1c496644d4/GastonMauroDiaz-caiman-d92758d"  \
  --library="E:/R-3.2.1/library" --install-tests

ERROR: dependencies 'raster', 'pracma', 'EBImage', 'rgdal' are not available for package 'caiman'
* removing 'E:/R-3.2.1/library/caiman'
错误: Command failed (1)

fish01

也使用了githubinstall("baidumap")安装，同样失败：
> githubinstall("baidumap")
Select a number or, hit 0 to cancel.

1: GastonMauroDiaz/caiman   Create Tile Grid Maps
2: Ironholds/batman         Create Tile Grid Maps
3: carrollrm/fillmap        Create Tile Grid Maps
4: ericpante/marmap         Create Tile Grid Maps
5: jasdumas/dumas           Create Tile Grid Maps
6: nathanieltwarog/braidrm  Create Tile Grid Maps
7: peterhurford/batchman    Create Tile Grid Maps
8: seankross/minimap        Create Tile Grid Maps

Selection:
选择其中1个，也不成功