cannot save quadrature data

I have this kind of data

{1 + 2i

3 + 4i

2 + 7i

....}

I used fprintf to save the above

file_name = fopen('data.txt','w');
fprintf(file_name, '%s\r\n', data);
fclose(file_name)

I got data.txt and theronly exist the real value

like

1

3

2

....

not the

1 + 2i

3 + 4i

2 + 7i

...

How to save this data type properly?

Answer 1

[Walter Roberson]

file_name ='data.txt';
fid = fopen(file_name, 'w');
fprintf(fid, '%.17e%+.17ei\r\n', [real(data.'); imag(data.')]);
fclose(fid)

I deliberately did not put a space between the real and imaginary parts: some parsing software can only detect the imaginary part as being part of the same number if there is no space. You can put a space before %+ if you want.

If you need a space after the sign for the complex part, then that would need more work.