Mrthfx

In order to analyze simulated data, @risk provides a histogram with handle bars, so that we can move these handles to see what proportion of data are on each side. For example,

.

I am trying to create similar graph for my empirical data, but I have no idea how to do it. Any help starting with the following code would be much appreciated.

   mydata = RandomVariate[TriangularDistribution[{100, 400}, 200], 5000];

   Histogram[mydata, Automatic, "Probability"]

   mydist = EmpiricalDistribution[mydata];

A starting point:

BlockRandom[SeedRandom[42]; (* for reproducibility *)

            mydata = RandomVariate[TriangularDistribution[{100, 400}, 200], 5000]];



DynamicModule[{hd, hist, xmin, xmax, yr},

              Manipulate[Show[hist, 

                              Plot[PDF[hd, x], {x, h[[1, 1]], h[[2, 1]]},

                                   Exclusions -> None, Filling -> {1 -> Axis},

                                   FillingStyle -> Opacity[0.8, Pink],

                                   PlotPoints -> 95, PlotRange -> yr, 

                                   PlotStyle -> Directive[AbsoluteThickness[2], Pink]],

                              Axes -> None, Frame -> True,

                              GridLines -> {{h[[1, 1]], h[[2, 1]]}, None}, 

                              Method -> {"GridLinesInFront" -> True}, 

                              PlotLabel -> StringForm["``%",

                                                      100 Round[Abs[CDF[hd, h[[2, 1]]] -

                                                                    CDF[hd, h[[1, 1]]]],

                                                                0.001]]],

                         {{h, {{xmin, 0}, {xmax, 0}}}, Locator, Appearance -> None},

                         Initialization :> (hd = HistogramDistribution[mydata];

                                            {xmin, xmax} = First[hd["Domain"]]; 

                                            hist = Histogram[mydata, Automatic, "PDF", 

                                            ChartBaseStyle ->

                                            Directive[EdgeForm[], LightPink]];

                                            yr = Last[Charting`get2DPlotRange[hist]];)]]

Try this:

With[{dist = CDF[mydist]},

 Manipulate[

  Histogram[mydata, Automatic, "Probability",

   PlotRange -> {MinMax@mydata, All},

   PlotLabel -> 

    StringForm["Percent Inside: ``" , 

     dist[bounds[[2]]] - dist[bounds[[1]]]],

   Epilog ->

    {

     EdgeForm[None],

     GrayLevel[1, .5],

     Rectangle[

      {Min@mydata, 0},

      {bounds[[1]], 1000000}

      ],

     Rectangle[

      {bounds[[2]], 0},

      {Max@mydata, 1000000}

      ]

     }

   ],

  {

   {bounds, Rescale[{.25, .75}, {0, 1}, MinMax@mydata]},

   Sequence @@ MinMax@mydata,

   ControlType -> IntervalSlider

   }

  ]

 ]