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Histrogram Objects

Histogram Objects can be created within the ProblemModuleInit routine in problem.f90. To create histograms you first need to add two USE statements to your problem.f90

  USE Histograms
  USE Fields

Then in ProblemModuleInit declare a variable pointer of type HistogramDef

  TYPE(HistogramDef), POINTER :: Histogram

Then create the Histogram and set the various parameters as in the following example

    CALL CreateHistogram(Histogram)
    Histogram%Field%id=MixingRatio12_Field
    Histogram%Field%component=GASCOMP
    Histogram%Field%name='Mixing_Ratio'
    Histogram%minvalue0d0
    Histogram%maxvalue=1d0
    Histogram%nbins=100
    Histogram%scale=LINEARSCALE
    Histogram%WeightField=MASS

• For more information on the Field sub-object's properties see ProcessingFields
• If you are making several histograms, you can reuse the Histogram Pointer (with or without Nullifying it) by calling CreateHistogram(Histogram) for each new histogram.

Here is a full list of the various Histogram parameters with the default values in brackets:

      INTEGER :: Scale=[LINEARSCALE], LOGSCALE
      REAL(KIND=qPREC) :: minvalue=[MINOVERALL], or any real number
      REAL(KIND=qPREC) :: maxvalue=[MAXOVERALL], or any real number
      INTEGER :: nBins=[100], or any integer
      INTEGER :: WeightField=[VOLUME], MASS, or any valid FieldID

Then at each process event (currently each frame) a curve file will be generated in the out directory ie. out/Histogram00021.curve that will contain all of the histograms for that frame. See CurveFiles for more information on plotting curve files in visit.