在 Matlab 中使用 bash shell
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Using bash shell inside Matlab
提问by ali
I'm trying to put a large set of bash commands into a matlab script and manage my variables (like file paths, parameters etc) from there. It is also needed because this workflow requires manual intervention at certain steps and I would like to use the step debugger for this.
我正在尝试将大量 bash 命令放入 matlab 脚本并从那里管理我的变量（如文件路径、参数等）。它也是必需的，因为此工作流程需要在某些步骤手动干预，我想为此使用步骤调试器。
The problem is, I don't understand how matlab interfaces with bash shell.
I can't do system('source .bash_profile')to define my bash variables. Similarly I can't define them by hand and read them either, e.g. system('export var=somepath')and then system('echo $var')returns nothing.
问题是，我不明白 matlab 如何与 bash shell 接口。我无法system('source .bash_profile')定义我的 bash 变量。同样，我也无法手动定义它们并读取它们，例如system('export var=somepath')，然后不system('echo $var')返回任何内容。
What is the correct way of defining variables in bash inside matlab's command window? How can I construct a workflow of commands which will use the variables I defined as well as those in my .bash_profile?
在 matlab 的命令窗口内的 bash 中定义变量的正确方法是什么？我如何构建一个命令工作流，该工作流将使用我定义的变量以及我的 .bash_profile 中的变量？
回答by Gilead
If all you need to do is set environment variables, do this in MATLAB:
如果您需要做的只是设置环境变量，请在 MATLAB 中执行此操作：
>> setenv('var','somepath')
>> system('echo $var')
回答by tilo
Invoke Bash as a login shell to get your ~/.bash_profile sourced and use the -c option to execute a group of shell commands in one go.
调用 Bash 作为登录 shell 来获取您的 ~/.bash_profile 来源，并使用 -c 选项一次性执行一组 shell 命令。
# in Terminal.app
man bash | less -p 'the --login option'
man bash | less -p '-c string'
echo 'export profilevar=myProfileVar' >> ~/.bash_profile
# test in Terminal.app
/bin/bash --login -c '
echo "##代码##"
echo ""
echo "$@"
export var=somepath
echo "$var"
echo "$profilevar"
ps
export | nl
' zero 1 2 3 4 5
# in Matlab
cmd=sprintf('/bin/bash --login -c ''echo "$profilevar"; ps''');
[r,s]=system(cmd);
disp(s);
