How to edit an entire column of a text file using MATLAB?

조회 수: 7(최근 30일)
Salman Zafar
Salman Zafar 2020년 12월 12일
답변: Priyanka Rai 2021년 1월 4일
I have text file consist of a node and element connectivity data, with a specific phyiscal property value assigned to each element. I need to change these physical values for every element.
I have attached a sample text file. Precisely, I need to change the values of 'Kxx' and 'Kyy' column.
Is there any way to do this?
  댓글 수: 6
Mathieu NOE
Mathieu NOE 2020년 12월 14일
sorry, I don't follow
I thought you wanted to change values (in 100 files ? ) , but now you mention I need to perform flow analysis on 100 different values of Kxx and Kyy between 1e-11 and 1e-10
it's not really the same , or ? analysis vs. replacement ??

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Priyanka Rai
Priyanka Rai 2021년 1월 4일
It is easier to edit files by code. So, if it is possible to hold a file in memory, you can load it to a MATLAB variable, make the required edits, and write back out.
You can read the entire text file using fileread/ readlines and read the parameters separately using readtable. You can then modify the values in the table and write back out.
Text files are sequential, so processing columns basically is easier in memory.
You can also check this readfile function from the FEX (also works pre- MATLAB R2020b).


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