text: ## how can i compute the length of an integer?
  
  on 4 Jan 2013
  
  if i have
  int = 12345;
  length_int = 5;
  ???
  
  Jan
  
  ### Jan (view profile)
  
  on 4 Jan 2013
  What is the "length" of -1 and 0?
  
  ### Azzi Abdelmalek (view profile)
  
  on 4 Jan 2013
  Edited by Azzi Abdelmalek
  
  ### Azzi Abdelmalek (view profile)
  
  on 4 Jan 2013
  
  int=-123456789
  max(ceil(log10(abs(int))),1)
  
  ### Sean de Wolski (view profile)
  
  on 4 Jan 2013
  Edited by Sean de Wolski
  
  ### Sean de Wolski (view profile)
  
  on 4 Jan 2013
  
  Edit
  nnz(num2str(int) - '-')
  
  Show 1 older comment
  Sean de Wolski
  
  ### Sean de Wolski (view profile)
  
  on 4 Jan 2013
  Friedrich, neither work actually, consider -12345.
  Friedrich
  
  ### Friedrich (view profile)
  
  on 4 Jan 2013
  Good point Sean. But then
  numel(num2str(abs(int)))
  should do ;)
  Sean de Wolski
  
  on 4 Jan 2013
  arghh, you win!
  
  ### Davide Ferraro (view profile)
  
  on 4 Jan 2013
  
  Casting the variable into a string may be risky because you may get to "unexpected" cases such as:
  int = 12345678901234567890123
  numel(num2str(int))
  ans =
  12
  You may consider a numeric approach using LOG10: floor(log10(int))+1 all numbers between 10 and 100 will have a LOG10 between 1 and 2 so you can use FLOOR to get the lower value (1 in this case) and then you need to add the value 1 cause you are trying to compute the number of digits and not the power of ten.
  
  G A
  
  ### G A (view profile)
  
  on 4 Jan 2013
  why, it works:
  >> int = 12345678901234567890123
  numel(num2str(int))
  int =
  1.2346e+22
  ans =
  23
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