如何使用MATLAB在文件中读取复数

Question

I need read values of a txt file with MATLAB, the file is here:

-0.933475 0.358642
-1 6.12323e-17

but I have some troubles with this value 6.12323e-17 , in matlab when I read it, the vale is 0.0000

here is the MATLAB code:

close all; clear;
arquivo = fopen('fftOut.txt');
formatSpec = '%f %f';
sizeA = [2 inf];
X = fscanf(arquivo,formatSpec, sizeA);
X'
fclose(arquivo);

and the output is

   -0.9335    0.3586
   -1.0000    0.0000

How can I handle it 0.0000 ?

Thanks in advance

Answer 1

You are using %f which is fixed point. Use %e for exponential notation. Check out mathwork's web site: http://www.mathworks.com/help/matlab/matlab_prog/formatting-strings.html?refresh=true

Answer 2

It's not 0, when matlab prints a matrix, it uses the same notation for all elements, so the printed value is truncated but the stored one isn't.

Try printing just the imaginary part of the second number.