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From: "Christopher M. Miles" <numbchild@gmail.com>
To: Org-mode <emacs-orgmode@gnu.org>
Subject: [SOLVED] Re: How to change working directory in ob-matlab source block?
Date: Thu, 13 Apr 2023 13:35:30 +0800	[thread overview]
Message-ID: <m2sfd4qr4r.fsf@numbchild@gmail.com> (raw)
In-Reply-To: <CAL1eYuJqNkEk=2L1+WhH__OB_fXBYo5zyyVzbNmUBrJTqKbrKg@mail.gmail.com>

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stardiviner <numbchild@gmail.com> writes:

> Is there friend know Emacs Org mode and Matlab here?
>
> I try to save Matlab plot into image file in another path instead of current working directory. Like
> bellowing code:
>
> #+headers: :var cwd=(expand-file-name "data/images/" (file-name-directory (buffer-file-name)))
> #+headers: :prologue "eval(sprintf("cd '%s'", cwd))"
> #+headers: :epilogue "saveas(gcf,'matlab-plot-demo2.png'); close(gcf);"
> #+begin_src matlab :results graphics file link :dir "data/images" :file "matlab-plot-demo2.png" :session
> "*MATLAB*"
> bar([1 11 7 8 2 2 9 3 6])
> #+end_src
>
> #+RESULTS[(2023-04-13 00:09:01) c5fc0d36b27e75610664ee69ae618649637e45d9]:
> [[file:data/images/matlab-plot-demo2.png]]
>
> But Matlab command "cd" does not work correctly in upper code method.
>

I find out the solution. The "cd" command used as a function then pass
in path string as argument. It works fine. So I adopt source block like
this:

#+headers: :var cwd=(expand-file-name "data/images/" (file-name-directory (buffer-file-name)))
#+headers: :prologue "cd(cwd)"
#+begin_src matlab :session "*MATLAB*" :results output
% eval(sprintf("cd '%s'", cwd))
% eval(sprintf("cd('%s')", cwd))
% cd(cwd)

% returns the path to the current working directory.
pwd
#+end_src

#+RESULTS[(2023-04-13 13:20:27) 0c1259b084fc93f95d7c60c9c748a0630bf4391d]:
#+begin_example
cd(cwd)
cwd='/Users/stardiviner/Org/Wiki/Computer Technology/Programming/Emacs/Emacs Packages/Org mode/data/images/';
% eval(sprintf("cd '%s'", cwd))
% eval(sprintf("cd('%s')", cwd))
% cd(cwd)
% returns the path to the current working directory.
pwd

ans =

    '/Users/stardiviner/Org/Wiki/Computer Technology/Programming/Emacs/Emacs Packages/Org mode/data/images'
#+end_example

Really tricky for me. Hope helpful for some user.

-- 

[ stardiviner ]
I try to make every word tell the meaning that I want to express without misunderstanding.

Blog: https://stardiviner.github.io/
IRC(libera.chat, freenode): stardiviner, Matrix: stardiviner
GPG: F09F650D7D674819892591401B5DF1C95AE89AC3

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     prev parent reply	other threads:[~2023-04-13  5:38 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-04-13  5:01 How to change working directory in ob-matlab source block? stardiviner
2023-04-13  5:35 ` Christopher M. Miles [this message]

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