How can I modify a part of my text file

Hello everyone,

I have a .dat file like in the picture and I would like to modify I3 values (the last column). I want to replace the values by (old values+Delta(m,n)) .

I can't use textscan since the beginning of the file has a different format. Do you have any idea on how can I do this ?

[KSSV]

Why you cannot use textscan? You can give headerlines in textscan and skip the initial lines.

[Izem]

Thank you for your answer! But please how ? do you have an example ?

[KSSV]

Attach your text file.

[Izem]

I am really sorry, I cant because it's a .m01 file but I read it as a text file. It s exactely as in the picture, the headerline is 9.

I can take care of details, I Just need the important part of the algorithm

[Izem]

Hello! I wrote it in this text file, please find it attached

[Rik]

How is this question different from you previous question?

[Izem]

t is not different. I accpeted your answer before testing it and I apologize for that. but It is not working for me, I have these errors :

-'readfile' is not found in the current folder or on the MATLAB path, but exists in, but that's ok when I change it to fileread

-Brace indexing is not supported for variables of this type. I tried some solution but did'nt work

[Izem]

I can modify the text file using textscan like this :

            fip = fopen(['InputPidSidelinef',num2str(f(c)),'.dat']);
            C = textscan(fip,'%s %s %f');
            
            fic = fopen(newname);
            delta = C(:,3);
            correction = delta{1,1};
            data = textscan(fic,'%f %f %f %f %f %f %f','headerLines',8);
            vals = data{7};
            for i=1:length(vals)
                data{7}(i) = data{7}(i)+correction(i);
            end
            

But hwo can I store all the data and write it back ?

[Izem]

@Rik can you please help! I am really strugling with this..

[Rik]

You need to get my readfile function from the FEX or with the add-on explorer. Did you do that?

[Izem]

I don't know what FEX or add-on explorer mean, can you please just tell me how can I store data and write it back after using textscan as in my previous comment.

what you did last time : 'str=data{n};' was not working

So do you have any idea how can I do it ?