How to pass a Matlab variable to shell environment?

18 次查看（过去 30 天）
MatteP
MatteP 2018-1-15
评论： Walter Roberson 2023-6-19
Good morning,
I have the same problem apperntly aksed in this thread
https://it.mathworks.com/matlabcentral/answers/317586-how-to-pass-a-variable-to-a-unix-command-e-g-sed-inside-a-matlab-script?s_tid=gn_loc_drop
but not solved.
I need to pass a variable from matlab to UNIX shell. Let's say I want to print a variable defined within Matlab workspace using "echo" (let's skip for the moment why I would want to do it). This was my attempt
for i=1:9
! echo ${i}
end
but it does not work. How can I pass then a variable defined in Matlab to UNIX environment?
Thanks and best regards

请先登录，再回答此问题。

回答（1 个）

Shivam
Shivam 2023-6-18
You can use system command in matlab , here is one use case -
% Define variables
var1 = 'Hello';
var2 = 'world';
% Construct the command
command = ['echo ', var1, ' ', var2];
% Execute the command
system(command);
Output - Hello World
Learn More about system commands - Execute operating system command and return output - MATLAB system - MathWorks India
  1 个评论
Walter Roberson
Walter Roberson 2023-6-19
Ran in:
If the var* values contain shell meta characters, then this approach can end up a little different than the echo ${i} approach in shell. Best would be to add quotes, like
% Define variables
var1 = 'Hello';
var2 = 'world';
% Construct the command
command = "echo '" + var1 + "' '" + var2 + "'"
command = "echo 'Hello' 'world'"
% Execute the command
system(command);
Hello world

请先登录，再进行评论。

类别

在 Help Center 和 File Exchange 中查找有关 Introduction to Installation and Licensing 的更多信息

标签

产品

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by