Jtdcftul

Multiple uses of a text file containing numbers include a representation in a table. I read the file line by line and save those in a macro for a later use in a table. I use the S-column specifier of siunitx to format those numbers. Unfortunately, the occasionally present exponents are not parsed, i.e. the mantissa is parsed, but the exponents still remain in the output with some space.

If I explicitely use num{line} instead, all is done perfectly (except, commas are not placed below each other). So, what's wrong here?

$pdflatex -shell-escape main.tex 

This is pdfTeX, Version 3.1415926-2.5-1.40.14 (TeX Live 2013/Debian)

Minimal example:

 documentclass{article}

 usepackage{siunitx}

 sisetup{

    locale = DE,

    round-precision=6,

    table-format=1.6e+1,

    round-mode=places,

 }



makeatletter

newreadinfile

defpreparetable#1{

    @bsphack

    bgroup

    openininfile=#1

    let\=relax

    newcountlinecnt

    gdefusetable{}

    endlinechar=-1

    @whileswunlessifeofinfilefi{%

        advancelinecnt by @ne

        readlineinfile to line

        ifrelaxlinerelaxelse

            xdefusetable{usetable thelinecnt & line  \}

        fi

    }

     egroup

    @esphack

}

makeatother



begin{document}

begin{tabular}{cS}

    Schritt & {Fehler} \

    preparetable{test.test}

    usetable

end{tabular}

end{document}

and an example file:

    0.37159

    0.026349

    1.1273e-04

    1.8199e-09

    4.0825e-17

You should use read and not readline, which assigns the wrong category code to e. You also had many spurious spaces in the preparetable macro definition.

begin{filecontents*}{jobname.dat}

0.37159

0.026349

1.1273e-04

1.8199e-09

4.0825e-17

end{filecontents*}



documentclass{article}

usepackage{siunitx}

sisetup{

    locale = DE,

    round-precision=6,

    table-format=1.6e+2,

    round-mode=places,

}



makeatletter

newreadinfile

defpreparetable#1{%

    @bsphack

    bgroup

    openininfile=#1relax

    let\=relax

    newcountlinecnt

    gdefusetable{}%

    endlinechar=-1

    @whileswunlessifeofinfilefi{%

        advancelinecnt by @ne

        readinfile to line

        ifrelaxlinerelaxelse

            xdefusetable{usetable thelinecnt & line  \}%

        fi

    }%

    egroup

    @esphack

}

makeatother



begin{document}

begin{tabular}{cS}

    Schritt & {Fehler} \

    preparetable{jobname.dat}

    usetable

end{tabular}

end{document}

The mandatory expl3 version:

begin{filecontents*}{jobname.dat}

0.37159

0.026349

1.1273e-04

1.8199e-09

4.0825e-17

end{filecontents*}



documentclass{article}

usepackage{siunitx}



sisetup{

    locale = DE,

    round-precision=6,

    table-format=1.6e+2,

    round-mode=places,

}



ExplSyntaxOn

NewDocumentCommand{maketable}{m}

 {

  camelcase_table_make:n { #1 }

 }



tl_new:N g_camelcase_table_body_tl

tl_new:N l__camelcase_table_entry_tl

int_new:N l_camelcase_table_row_int

ior_new:N g_camelcase_table_stream



cs_new_protected:Nn camelcase_table_make:n

 {

  int_zero:N l_camelcase_table_row_int

  ior_open:Nn g_camelcase_table_stream { #1 }

  tl_build_gbegin:N g_camelcase_table_body_tl

  ior_map_variable:NNn g_camelcase_table_stream l__camelcase_table_entry_tl

   {

    int_incr:N l_camelcase_table_row_int

    tl_build_gput_right:Nx g_camelcase_table_body_tl

     {

      int_to_arabic:n { l_camelcase_table_row_int }

      &

      exp_not:V l__camelcase_table_entry_tl

      exp_not:N \

     }

   }

  tl_build_gend:N g_camelcase_table_body_tl

  tl_use:N g_camelcase_table_body_tl

 }

ExplSyntaxOff



begin{document}

begin{tabular}{cS}

    Schritt & {Fehler} \

    maketable{jobname.dat}

end{tabular}

end{document}