Input complex matrix from txt file into matlab variable

Hi! I have a txt file, where i have matrix about 30x1000. All numbers within are double and complex. So the question is - how to get this complex matrix into matlab to built plot? Cause when i try it some methods get Nan, some method get incorrect and not complex numbers.

Example of number in file : 1+1*i I can change it, and i tried different variant already. Always a i get nothing or smith about 49 when the number is just 1+ 1*i I tried ImportData, load and fopen, but maybe i tried something incorrect. Thank you for your help!

[per isakson]

"but maybe i tried something incorrect." &nbsp probably yes, but you supply to little detail for us to spot the error.

Answer 1

[per isakson]

Excerpt from textscan, Read formatted data from text file or string:

    textscan imports any complex number as a whole into a complex numeric field,
    converting the real and imaginary parts to the specified numeric type (such 
    as %d or %f). [...]

    Do not include embedded white space in a complex number. textscan interprets
    embedded white space as a field delimiter.

Thus,

• textscan should read your file without problems
• 1+ 1*i with a space is not allowed.&nbsp

Warning: Test of reading 1-i with R2013b

    str = '1+1i 1-i';
    cac = textscan( str, '%f', 'CollectOutput', true );
    cac{:}
    ans =
       1.0000 + 1.0000i
       1.0000 + 0.0000i

No warning, no error just an unexpected result! I don't find this nasty behavior described in the documentation

Answer 2

[Stephen23]

You can use textscan to read a textfile with complex values. Here I show how this works on a string:

>> S = '5+6i 3-2i 1-1i @ 4+i 2-0.2i 2.5-1.3i @';
>> C = textscan(S,'%f%f%f@', 'CollectOutput',true);
>> C{1}
ans =
            5 +          6i            3 -          2i            1 -          1i
            4 +          1i            2 -        0.2i          2.5 -        1.3i