A fit can be operate in 4 steps :

  1 - Define everything in a single "model" file.
  2 - Load that "model" file.
  3 - Launch the fit.
  4 - Analyse the results.

Define everything in a single "model" file

  You can start from the template file in which you will find all the
  necessary comments. You can see this file as a form.

  o First, you define the targets you want to process. yoga allows you to
    fit several targets at the same time if you want to. For each target,
    you define :
  
    * The list of files where to find the data for this target.

    * The model of the object you want to use for the fit. You will find
      useful to be allowed to give meaningful names to the parameters.

    * The modules you want to use to compute the residuals, i.e. the
      distance between the model and the data.

  o Second, you can gives some numbers for the parameters, as starting
    values, and bounds.

  o Third, you can choose the strategy for the fit, as standard fit,
    randomized starting points, etc.


Load the model

  > LITpro_load_model, "your file"

  This command loads and configures everything accordingly to you
  indications in the "model" file.

  At this stage, you can "see" (display) the data for each target.


Launch the fit

  > LITpro_TBD

  You can stop the fit.

Analyse the results

  A set of commands allows the user to assess the quality of the fit.