MATLAB Answers


How can I change fileID name in a for loop?

Asked by Maazen ALSABAAN on 14 Nov 2012

Hi, I have this for loop

for i=1:3
    if i==1
    fid = fopen('report_1.xls', 'wt');       
    if i==2
    fid = fopen('report_2.xls', 'wt');        
    if i==3
    fid = fopen('report_3.xls', 'wt');        

In fact, I have much bigger than this loop. The problem is that I have to repeat fopen for each i. My question is can I avoid the if statements. So, the value of i can be written in fileID without adding it manually. For example,

for i=1:3
   fid = fopen('report_i.xls', 'wt');       

The above example will create a file named "report_i". However, I want to create 3 files named "report_1" , "report_2", and "report_3". How can I do that?

Thank you so much in advance



2 Answers

Answer by Pedro Villena
on 14 Nov 2012
Edited by Pedro Villena
on 14 Nov 2012
 Accepted answer

 for i=1:3
    fid(i) = fopen(sprintf('report_%d.xls',i), 'wt');       

  1 Comment

Thank you! I appreciate it

Answer by C.J. Harris
on 14 Nov 2012


Thank you! I appreciate it

Jan Simon
on 14 Nov 2012

And when you read this section of the FAQ, read the rest also. It is very efficient to profit from the mistakes, which have been made repeatedly by others.

Discover MakerZone

MATLAB and Simulink resources for Arduino, LEGO, and Raspberry Pi

Learn more

Discover what MATLAB® can do for your career.

Opportunities for recent engineering grads.

Apply Today

MATLAB Academy

New to MATLAB?

Learn MATLAB today!