access specific element from importfile

I have a data file “8545.txt” and I import the data using matlab and generate a matlab function (importfile.m) for that. So I have now the matlab generated file called ”importfile” and in the main program I write,

    filename='8545.txt';
    [t2,mass,time,chan,op,Com] = importfile(filename);

Now, if I want to access a specific value of “t2” for using in another place, how do I define an array (or something which works) which will enable me to access any specific value of “t2”. So, if t2 runs from 1 to 32, and I want to set some other variable in my code equal to a specific value of t2, i.e. f[t2] == m ….. something like that, how to do it?

For example, t2: 1 to 32, mass: 1 to 6, time: 0 to 64, chan: 1 to 4, op: 1 to 4, Com=complex number. So the data file looks like this:

    1,1,1,1,1,3.273340e-08-1.351995e-09 i
    1,1,1,1,2,6.339880e-09-1.015066e-09 i
    1,1,1,1,3,-1.824081e-09-2.522303e-09 i

and so on. The last line is

    32,6,64,4,4,-6.479969e-10-4.213433e-10 i

 . So I would like to set some variable m equal to some specific value of t2

Thanks for your help.

[per isakson]

See http://www.mathworks.se/help/matlab/text-files.html

The space between the number and "i" may cause a problem.

[Sabbir]

Thanks for the link. I read it, but couldn't figure out

Answer 1

[per isakson]

Example

    >> fid = fopen( 'complex.txt' );
    >>
    cac = textscan( fid, '%f%f%f%f%f%f', 'Delimiter', ',', 'Whitespace', '' )
    cac = 
      Columns 1 through 5
        [3x1 double]    [3x1 double]    [3x1 double]    [3x1 double]    [3x1 double]
      Column 6
        [3x1 double]
    >> cac{6}
    ans =
       1.0e-07 *
       0.3273 - 0.0135i
       0.0634 - 0.0102i
      -0.0182 - 0.0252i
    >> fclose all

where complex.txt consists of

    1,1,1,1,1,3.273340e-08-1.351995e-09i
    1,1,1,1,2,6.339880e-09-1.015066e-09i
    1,1,1,1,3,-1.824081e-09-2.522303e-09i

However, I failed to read the file with a space before the "i". To do that the approach needs to be something like

• read the file as text: str = fileread(complex.txt);
• str = strrep( str, ' ', '' );
• cac = textscan( str, '%f%f%f%f%f%f', 'Delimiter', ',', 'Whitespace', '' )

Thus, my question is whether you can avoid the space when writing the file.

If you remove the space you can use dlmread

    M = dlmread( 'complex.txt' );
    >> M(:,6)
    ans =
       1.0e-07 *
       0.3273 - 0.0135i
       0.0634 - 0.0102i
      -0.0182 - 0.0252i

The second part of your question, I don't understand.