Code:
\documentclass{scrartcl}
\usepackage{tikz, pgfplots}
% \begin{filecontents}{test.dat}
% level,dof,error1,error2,info,{grad(log(dof),log(error2))},quot(error1)
% 1,4,2.50000000e-01,7.57858283e-01,48,0,0
% 2,16,6.25000000e-02,5.00000000e-01,25,-3.00000000e-01,4
% 3,64,1.56250000e-02,2.87174589e-01,41,-3.99999999e-01,4
% 4,256,3.90625000e-03,1.43587294e-01,8,-5.00000003e-01,4
% 5,1024,9.76562500e-04,4.41941738e-02,22,-8.49999999e-01,4
% 6,4096,2.44140625e-04,1.69802322e-02,46,-6.90000001e-01,4
% 7,16384,6.10351562e-05,8.20091159e-03,40,-5.24999999e-01,4
% 8,65536,1.52587891e-05,3.90625000e-03,48,-5.35000000e-01,3.99999999e+00
% 9,262144,3.81469727e-06,1.95312500e-03,33,-5.00000000e-01,4.00000001e+00
% 10,1048576,9.53674316e-07,9.76562500e-04,2,-5.00000000e-01,4.00000001e+00
% \end{filecontents}
\begin{filecontents}{test.dat}
level dof error1 error2 info {grad(log(dof) log(error2))} quot(error1)
1 4 2.50000000e-01 7.57858283e-01 48 0 0
2 16 6.25000000e-02 5.00000000e-01 25 -3.00000000e-01 4
3 64 1.56250000e-02 2.87174589e-01 41 -3.99999999e-01 4
4 256 3.90625000e-03 1.43587294e-01 8 -5.00000003e-01 4
5 1024 9.76562500e-04 4.41941738e-02 22 -8.49999999e-01 4
6 4096 2.44140625e-04 1.69802322e-02 46 -6.90000001e-01 4
7 16384 6.10351562e-05 8.20091159e-03 40 -5.24999999e-01 4
8 65536 1.52587891e-05 3.90625000e-03 48 -5.35000000e-01 3.99999999e+00
9 262144 3.81469727e-06 1.95312500e-03 33 -5.00000000e-01 4.00000001e+00
10 1048576 9.53674316e-07 9.76562500e-04 2 -5.00000000e-01 4.00000001e+00
\end{filecontents}
\begin{document}
% Geht nicht:
%\pgfplotstabletypeset[col sep=comma,columns={level,quot(error1)}]{test.dat}
% Geht:
\pgfplotstabletypeset[columns={level,quot(error1)}]{test.dat}
\end{document}
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