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');       
    end
    if i==2
    fid = fopen('report_2.xls', 'wt');        
    end
    if i==3
    fid = fopen('report_3.xls', 'wt');        
    end
end

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');       
end

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

  0 Comments

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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');       
 end

  1 Comment

Maazen ALSABAAN on 14 Nov 2012

Thank you! I appreciate it


Answer by C.J. Harris
on 14 Nov 2012

  2 Comments

Maazen ALSABAAN 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.


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