我知道已经有人问过这个问题，但是发布的所有答案都无法帮助解决我的问题。我在 Ubuntu 14.04 上尝试了以下命令：
sudo apt-get install r-base-core
我得到：
The following packages have unmet dependencies:
r-base-core : Depends: libtiff4 but it is not installable
Recommends: r-recommended but it is not going to be installed
Recommends: r-base-dev but it is not going to be installed
Recommends: r-doc-html but it is not going to be installed
E: Unable to correct problems, you have held broken packages.
我也用 aptitude 尝试过：
The following packages have unmet dependencies:
r-base-core : Depends: libtiff4 which is a …