str2double('00010001') or str2num('00010001') gives output as 10001 by ignoring the MSB '000' bits how to retain them?

Hi, I have some filenames which start with '0**' something like that (00010001,00010002,...00010010 etc), When I use str2double on that filename string str2double('00010001') it outputs 10001 without considering the MSB bits. Is there anyway I can get the filename as '00010001'?

Thanks, Gopi

[KSSV]

As it is a file name it's class will be char/ string. Why to use str2double?

[Gopichandh Danala]

The problem is lets say the filenames are '1','2','10' and I want to read them in order after reading files Matlab by default reads them in order of '1','10' and then '2'. Even if i use sort function it does the same. So I need to get all filenames ans sort them properly before reading them

Answer 1

[Akira Agata]

I think you want to generate a list of file names with serial number whose prefix is '0001'. If so, the following code will help. This generates the file name list from '00010001' with length of N.

N = 10;
list = strcat(repmat('0001',N,1),num2str((1:N)','%04d'));

[Gopichandh Danala]

I am not trying to generate filenames as I said above I have files of above format and I want to read them in order, for which i need the full filename to do some sorting if necessary

[Gopichandh Danala]

Natural-Order Filename Sort

I found this in FEX and it solves my issue..

Thanks

[Jan]

See also:

for k = 1:10
  FileName = sprintf('File%04d.ext', k)
end