Increment file name by adding numbers in a loop

I want to select data piecewise in a loop, and I want to be able to save the files as filename_number, where the number increases for each iteration of the loop. Is there an easy way to accomplish this?

The idea is: first selection, saved file name is file_1 second selection, saved file name is file_2 etc

Answer 1

[Chirag Gupta]

Easy way to increment your filename is:

filename = sprintf('%s_%d','filename',k)

Answer 2

[Fangjun Jiang]

BaseName='MyDataFile_';
for k=1:10
FileName=[BaseName,num2str(k)]
end

[Alberto Rocha]

And how do I use FileName to save data in disk? I tried

save FileName variable -ascii

but the file that is saved gets the name "FileName", and not "MyDataFile_1" or "MyDataFile_2" etc.

[Stephen23]

@Alberto Rocha: you have to use function syntax, not command syntax:

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

Or, to put it simply, you need to use the parentheses:

 save(FileName,'X') % for variable X

[Alberto Rocha]

Thanks, Stephen!

[Mohammed Aliakbar]

Hi Fangjun, I tried this function and it work with me but when I tried to execute OpenSees.exe, it give me error as the following: BaseName='TS'; for k=1:3 FileName=[BaseName,num2str(k),'.tcl']; !OpenSees.exe FileName end and the message is as the following: couldn't read file "FileName": no such file or directory

[Steven Lord]

You can't use ! if the command you want the system to execute is going to be assembled using the contents of a variable. Use the system function instead, building the command you want the system to execute using concatenation (as you built FileName) or sprintf.