# archlinux下安装torch7的方法  
打开archlinux cn这个源  
然后:  
pacman -Sy loadcaffe-git torch7-cunn-git torch7-cutorch-git torch7-cwrap-git torch7-dok-git torch7-env-git torch7-git torch7-graph-git torch7-hdf5-git torch7-image-git torch7-lmdb-git torch7-nn-git torch7-nngraph-git torch7-optim-git torch7-paths-git torch7-sys-git torch7-tds-git torch7-threads-git torch7-xlua-git    
yaourt -S torch7-trepl-git  
如果不会打开这个源那么,就这样   
yaourt -Sy loadcaffe-git torch7-cunn-git torch7-cutorch-git torch7-cwrap-git torch7-dok-git torch7-env-git torch7-git torch7-graph-git torch7-hdf5-git torch7-image-git torch7-lmdb-git torch7-nn-git torch7-nngraph-git torch7-optim-git torch7-paths-git torch7-sys-git torch7-tds-git torch7-threads-git torch7-xlua-git torch7-trepl-git    

如果有些包装不上,那么  
yaourt torch7   
然后选择所有包,都装上就好了.torch7-trepl-git 这个是torch7的shell,一定要装. 

=========================================================


# 在其他系统中安装torch的方法:
只要有anaconda,就能有torch  
conda install lua=5.2 lua-science -c alexbw

还可以用IPython 和 ITorch 
jupyter-notebook

搞定!

==========================================================

# 如果想安装最新版的torch7:                
先用conda安装luarocks  
conda install -c conda-forge luarocks              
然后用这个luarocks安装torch7              
git clone https://github.com/torch/distro.git ~/torch --recursive   
cd ~/torch   
TORCH_LUA_VERSION=LUA52 ./install.sh      
source ~/.bashrc     
luarocks install image    
luarocks list   

这样就装好了,从git下来的最新的torch7   
$ th    
    
  ______             __   |  Torch7     
 /_  __/__  ________/ /   |  Scientific computing for Lua.     
  / / / _ \/ __/ __/ _ \  |  Type ? for help     
 /_/  \___/_/  \__/_//_/  |  https://github.com/torch     
                          |  http://torch.ch      
       
                                          
th> torch.Tensor{1,2,3}    
 1    
 2    
 3     
[torch.DoubleTensor of dimension 3]     
    
th>