Continue next statement on cd command

Question

LEONG SING YEW 2020-3-8

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/509703-continue-next-statement-on-cd-command

评论： John D'Errico 2020-3-12

采纳的回答： John D'Errico

Hi everyone

Is there a way to continue next line on this cd command? this is to make convenient for me to analyse data

cd 'D:\Onedrive\OneDrive -xxx\bbb\ccc\ddd\3. Simulation\3. Fluent Case\40um - 9\EquivalenceRatio_Osc\0.015\F100';

i tried this but it won't work

cd ['D:\Onedrive\OneDrive -xxx\bbb\ccc\ddd\3. Simulation\3. Fluent Case\40um - 9'...

'\EquivalenceRatio_Osc\0.015\F100'];

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Answer 1

John D'Errico 2020-3-8

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链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/509703-continue-next-statement-on-cd-command#answer_419099

在 MATLAB Online 中打开

Use cd as a FUNCTION call.

cd(['D:\Onedrive\OneDrive -xxx\bbb\ccc\ddd\3. Simulation\3. Fluent Case\40um - 9'...
    '\EquivalenceRatio_Osc\0.015\F100']);

Commands like CD are actually functions, where they can be used in either mode, either as a command or as a function.

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Stephen23 2020-3-8

编辑：Stephen23 2020-3-8

Read more here:

https://www.mathworks.com/help/matlab/matlab_prog/command-vs-function-syntax.html

Note that it is usually more efficient to access data files using absolute/relative filenames, rather than by changing directories. For example:

https://www.mathworks.com/matlabcentral/answers/112086-matlab-slow-when-too-many-files-in-directory

https://www.mathworks.com/matlabcentral/answers/484604-what-should-i-use-instead-of-cd

John D'Errico 2020-3-12

Stephen is correct here, in that when you change directories, this forces MATLAB to do some additional work. However, when you just specifiy the directory to look in to read a file, that other work need not be done. As such, MATLAB will be more efficient.

Save those CPU cycles!

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