PETSc version 3.17.4
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# PetscDrawHGCreate

Creates a histogram data structure.

### Synopsis

    #include "petscdraw.h"
    #include "petscsys.h"
    #include "petscviewer.h"
    PetscErrorCode  PetscDrawHGCreate(PetscDraw draw,int bins,PetscDrawHG *hist)

Collective on PetscDraw

### Input Parameters

| draw | - The window where the graph will be made
| bins | - The number of bins to use

### Output Parameters

| hist | - The histogram context

### Notes

The difference between a bar chart, PetscDrawBar, and a histogram, PetscDrawHG, is explained here https://stattrek.com/statistics/charts/histogram.aspx?Tutorial=AP

The histogram is only displayed when PetscDrawHGDraw() is called.

The MPI communicator that owns the PetscDraw owns this PetscDrawHG, but the calls to set options and add data are ignored on all processes except the zeroth MPI process in the communicator. All MPI processes in the communicator must call PetscDrawHGDraw() to display the updated graph.

### See Also

PetscDrawHGDestroy(), PetscDrawHG, PetscDrawBarCreate(), PetscDrawBar, PetscDrawLGCreate(), PetscDrawLG, PetscDrawSPCreate(), PetscDrawSP,
PetscDrawHGSetNumberBins(), PetscDrawHGReset(), PetscDrawHGAddValue(), PetscDrawHGDraw(), PetscDrawHGSave(), PetscDrawHGView(), PetscDrawHGSetColor(), PetscDrawHGSetLimits(), PetscDrawHGCalcStats(), PetscDrawHGIntegerBins(), PetscDrawHGGetAxis(), PetscDrawAxis, PetscDrawHGGetDraw()

### Level

intermediate

### Location

src/sys/classes/draw/utils/hists.c
Index of all Draw routines
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Index of all manual pages