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The set of commands starting with the letter e allows to edit various properties of the files available
in the online memory of FRIDA. The different command currently available are:

  • ec prints the coordinate names of selected files to the screen. It allows to change the name of the
    coordinates (x,y, and z-value denominators) as well as their unit. In case of selecting more than
    one file the coordinates of all files are changed simultaneously to the new set of coordinates. A
    typical output of ec can be found here.
  • ed prints the documentation of the selected files to the screen. This command further allows to
    modify this information. Most of the information given by this command is a track record of how the
    file has been modified. A typical output of produced by ed can be found here.
  • eg allows to define the basic plotstyle for the data. There are three different modes available.
    Selecting a number greater than zero will always plot the data as a line, with its style defined by
    he chosen number. Selecting a negative number will always plot the data using symbols for every
    data point. The symbol style is again defined by the chosen number. The third option is to chose
    zero leading to an automatic selection of either symbols or lines depending on whether the data
    to be plotted is real data or a fit curve, respectively. If more than one curve is plotted selecting
    the automatic option will also ensure that every real data curve is plotted with a unique symbol,
    whereas for fit curves always the same linestyle is used. Ad-hoc changes may be done by using
    the command gd. Data output is black and white due to the restrictions of Tektronix. Only in a
    later stage, once the PostScript figure has been created from the plotted data, colours become
    available. Therefore different curves can only be distinguished by differences in the plotsymbol or
    the chosen linestyle. A typical output generated by eg can be found here.
  • ei print integer data associated with a file to the screen. These parameters can currently not be
    modified in any way other than editing the file stored on the harddisk. Typically integer parameters
    are used by certain read-in routines in order to define generic features of the data for later treatment.
    One example is for instance the definition of positive and negative energy transfer and whether
    the file has been already symmetrized in case of inelastic neutron scattering. A set of very common
    parameters shown in this case can be found here.
  • er prints a set of real parameters of the chosen files to the screen. Already existing parameters
    can be modified by the user. New parameters can be appended at any time. A typical output of
    this command including showcases for the usage of the different options can be found here.
  • ez prints the z-coordinates of the chosen files to the screen. There are different options available to
    append new z-parameters or to delete z-parameters. A typical output generated by this command
    and some showcases to explain the different functions of this command can be found here.