MATLAB: Fopen ‘w’ not writing

fopenw

The following is my code. I seem to not be able to write the code into the phone.txt file. can anyone tell me where my error is? phonenos.csv is an file with 3 lines of 10 digits, reminiscent of a phone number without the dashes or parentheses. this code will write them into the format (xxx) xxx-xxxx
format long g
fid=fopen('phonenos.csv','r');
fid2=fopen('phone.txt','w');
for i=1:3
    phonenos=fgetl(fid);
    area=phonenos(1:3);
    next3=phonenos(4:6);
    last4=phonenos(6:9);
    phonenos=['(' area ') ' next3 '-' last4];
end
close=fclose(fid);
close2=fclose(fid2);
type phone.txt

Best Answer

You forget a fprintf(fid2,... line, so you are not writing anything with this code, just open and close the phone.txt file.
you need to complete this
fid=fopen('phonenos.csv','r');
fid2=fopen('phone.txt','w');
for i=1:3
    phonenos=fgetl(fid);
    area=phonenos(1:3);
    next3=phonenos(4:6);
    last4=phonenos(6:9);
    phonenos=['(' area ') ' next3 '-' last4];
    fprintf(fid2,................) % line to complete
end
close=fclose(fid);
close2=fclose(fid2);
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