source: branches/FACT++_scripts_refactoring/Hist1D.js@ 19425

/**
 * @fileOverview A simple one dimensional histogram.
 * @author <a href="mailto:thomas.bretz@epfl.ch">Thomas Bretz</a>
 */
'use strict';


if (!("Hist1D" in this)){
    var Hist1D = {
        /**
         *
         * @constructor
         *
         * @param {Interger} nx
         *
         * @param {Number} xmin
         *
         * @param {Number} xmax
         *
         * @returns
         *     A sub-classed array with the Hist1D functions added as properties.
         *
         * @example
         *     var hist = Hist1D(10, -0.5, 1.5);
         *
         */
        Hist1D : function(nx, xmin, xmax)
        {
            /**
             *
             * Array
             *
             */
            var arr = new Array(nx);

            /**
             *
             * @exports arr.get as Hist1D.get
             *
             */
            arr.get = function(x)
            {
                var ix = parseInt(nx*(x-xmin)/(xmax-xmin));

                return arr[ix] ? arr[ix] : 0;
            }

            /**
             *
             * @exports arr.fill as Hist1D.fill
             *
             */
            arr.fill = function(x, w)
            {
                if (!x || x===NaN)
                    return false;

                var ix = parseInt(nx*(x-xmin)/(xmax-xmin));
                if (ix<0 || ix>=nx)
                    return false;

                if (!arr[ix])
                    arr[ix] = 0;

                arr[ix] += w ? w : 1;

                return true;
            }

            /**
             *
             * @exports arr.print as Hist1D.print
             *
             */
            arr.print = function(len)
            {
                if (!len)
                    len = 40;
                if (len<6)
                    len = 6;

                var sum = arr.reduce(function(a,b){return a+b;}, 0);
                var max = arr.reduce(function(a,b){return Math.max(a,b);}, 0);

                console.out("");
                for (var ix=nx-1; ix>=0; ix--)
                {
                    var entry = arr[ix] ? arr[ix] : 0;

                    var line ="%3d [%3d%] ".$(ix, sum==0 ? 0 : 100*entry/sum);
                    if (arr[ix])
                    {
                        var val = parseInt(len*arr[ix]/max);
                        var entry = ("%"+val+"s").$("");
                        entry = entry.replace(/ /g, "*");
                        line += ("%-"+len+"s").$(entry)+" |";
                    }

                    console.out(line);
                }

                var entry = arr[ix] ? arr[ix] : 0;
                console.out("   --------"+("%"+(len-5)+"s").$("")+"-------");

                var line =" %9d  ".$(sum);
                line += ("%"+len+"d").$(max);
                console.out(line);
                console.out("");
            }

            return arr;
        },
    };
}
else{
    console.out("multiple include of 'Hist1D.js'")
}