1 \textbf{Loading data from files}

     2 

     3 \lstinline|loadtxt('filename')| returns the columns of file in one

     4 sequence. 

     5 

     6 \lstinline|x, y = loadtxt('filename', unpack=True)| to obtain a file

     7 with 2 columns in separate sequences. 

     8 

     9 \lstinline|loadtxt('filename', delimiter=';')|, if the file has

    10 columns separated by ';' instead of spaces/tabs. 

    11 

    12