How to write data to an exact row in a text file

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Al Onen 2012-10-1

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https://ww2.mathworks.cn/matlabcentral/answers/49532-how-to-write-data-to-an-exact-row-in-a-text-file

Hello, I need to edit a parameter text file for my task and I need to change the value on i.e. 30th row of that parameter file with a loop then save the file. I've tried to come up with a function that does the trick, but couldn't find a proper one.

I'll be faithful if someone can offer some guidance. Thanks in advance.

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Azzi Abdelmalek 2012-10-2

编辑：Azzi Abdelmalek 2012-10-2

What kind of data are in your file, why don't you post a sample of your text file?

don't comment your question with an answer, just post a comment like I did

Al Onen 2012-10-2

编辑：Al Onen 2012-10-2

在 MATLAB Online 中打开

Sorry, I am kind of in a hurry, here is my text file that I need to reference. I will create a loop to change REFKDT_DATA value (line 24) for further analysis. I tried to create variable references one by one, but Matlab gave dataread error.

General Parameters
SLOPE_DATA
9
0.1 
0.01
1.0
0.35
0.55
0.8
0.63
0.0
0.0
SBETA_DATA
-2.0
FXEXP_DATA
2.0
CSOIL_DATA
2.00E+6
SALP_DATA
2.6
REFDK_DATA
1.0E-6
REFKDT_DATA
2.0
FRZK_DATA
0.15
ZBOT_DATA
-8.0
CZIL_DATA
0.1
SMLOW_DATA
0.5
SMHIGH_DATA
3.0
REFMANN_DATA
8.0