How to fopen in this case?

Hi Everybody

Case1

fid = fopen('TTL_1.txt', 'w');

fprintf(fid3,'%s \n','ABCD;');

fclose(fid3);

Case2

file_name='TTL_1';

fid = fopen('file_name.txt', 'w');

fprintf(fid3,'%s \n','ABCD;');

fclose(fid3);

Case1 is OK!

However, Case 2 does not create a file.

How to fopen in this case?

Thanks!

Answer 1

[the cyclist]

You need to concatenate two character arrays, one of which you defined ahead ...

file_name='TTL_1';
fid = fopen([file_name,'.txt'], 'w');

[dmfwlansejr]

Thank you!