Re: [Gnuplot-info] Plotting fortran formatted data

[Sergei N. <vo...@ra...>]

Thanks a lot, Iva.Tried this but:

Terminal type set to 'qt'
gnuplot> set datafile separator ";"
gnuplot> set table $mydata
gnuplot> plot "qq" u (stringcolumn(1)[11:14]):(stringcolumn(1)[16:]) w table
^
x range is invalidgnuplot>

Here is the test data one more time:

J0023+092311.8D 0.085
J0030+045158.8P 0.861
J0034-0534 6.6D 1.255
-- Sergei


  28.12.2017, 20:12, ivana richterova <iva...@mf...>Hi Sergei,

  although to use external simple filter was intended in such cases,
  under unix-like OS e.g. "cut":


  gnuplot> plot '<cut -b 11-14,16- --output-delimiter=" " datafile'


  you can do this directly by gnuplot as well:


  # begin gnuplot code

  # replace datafile with real filename
  file="datafile"

  # set the data separator to a char missed in the file
  set datafile separator ";"

  # use string functions to extract columns of a given width to a named
  datablock
  set table $mydata
  plot file u (stringcolumn(1)[11:14]):(stringcolumn(1)[16:]) w table
  unset table

  # reset the data separator
  set datafile separator

  # uncomment to print the preprocessed datablock if you wish
  # print $mydata

  # plot the preprocessed datablock

  plot $mydata w lp t "extracted data"

  # end of gnuplot code


  sincerely

  Iva