editing large text file

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K.A. 2018-9-6

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/417820-editing-large-text-file

评论： K.A. 2018-9-6

Hi,

In Notepad (or equivalent softwares) there is a feature that does search a character, edit it, and "Replace All".

How I can edit a text file by doing Replace All using Matlab?

Example: assume I have a text file that has 300 characters like "HjY". I want to replace all these characters with "HjY(i)" in an automated way.

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KSSV 2018-9-6

It depends on how the file is.....you have to attach a file format so that we can help you.

K.A. 2018-9-6

IfileX.txt

Thanks KSSV,

In the attached file, there are variables that are listed from line number 4719 up to line 7402. Each line contains one variable. For instance, line number 7389 contains this variable "Q_input_C".

Now, I want to replace all these variables with themselves but after I add this suffix "(i)". All similar variables has to be replaced too. I will give an example to make it understandable.

Example: at line number 7317, there is this variable "I_line_upstream_B01_B03_C_r". I want to replace all variables in this file that are exactly similar to "I_line_upstream_B01_B03_C_r" with "I_line_upstream_B01_B03_C_r(i)". Then, I move to line 7318 and do the same thing and so on.

How can do this in a loop?

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Answer 1

ahmed nebli 2018-9-6

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/417820-editing-large-text-file#answer_335695

this is how is suggest you can do : -import your file/-use a for loop to search for 'H' and after it a 'j' and after it a 'Y' / if found : replace them with what you want