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		    The bedGraph format allows display of
		    continuous-valued data in track format. This display type is
		    useful for probability scores and transcriptome data. 
		    This track type is similar to the wiggle (WIG) format, 
		    but unlike the wiggle format, data exported in the bedGraph format 
		    are preserved in their original state. 
		    This can be seen on export using the table browser. 
		    For more details on data compression in wiggle tracks see the
		    notes section of the wiggle 
		    track description page.
		    If you have a very large data set and you would like to keep it 
		    on your own server, you should use the 
		    bigWig data format.
		     General Structure  The bedGraph format is
		    line-oriented.
		    Bedgraph data are preceeded by a 
		    track definition line, which
		    adds a number of options for
		    controlling the default display of this track.
		      Following the track definition line are the
		    track data in four column BED format.
  chromA  chromStartA  chromEndA  dataValueA
  chromB  chromStartB  chromEndB  dataValueB Parameters for bedGraph track definition linesAll options are placed in a single line separated by spaces:   track type=bedGraph name=track_label description=center_label
        visibility=display_mode color=r,g,b altColor=r,g,b
        priority=priority autoScale=on|off alwaysZero=on|off
        gridDefault=on|off maxHeightPixels=max:default:min
        graphType=bar|points viewLimits=lower:upper
        yLineMark=real-value yLineOnOff=on|off
        windowingFunction=maximum|mean|minimum smoothingWindow=off|2-16
(Note if you copy/paste the above example, you have to remove the carriage returns.)
The track type is REQUIRED, and must be bedGraph:   type=bedGraphThe remaining values are OPTIONAL. The wiggle documentation contains details on these options.
		    A functional description of these options can be
		    seen in the track configuration description. (Custom tracks do not 
		   have interactive configuration options.) Data ValuesBedgraph track data values can be integer or real,
		    positive or negative values. Chromosome positions
		    are specified as 0-relative.  The first chromosome
		    position is 0.  The last position in a chromosome
		    of length N would be N - 1.  Only positions specified
		    have data.  Positions not specified do not have
		    data and will not be graphed. All positions specified 
		    in the input data must be in numerical order. 
		    The bedGraph format has four columns of data:  chrom chromStart chromEnd dataValueNote: These coordinates are
		    zero-based, half-open. ExampleThis example specifies 9 separate data points in three 
		    tracks on chr19 in the region 59,302,001 to 59,304,701.
		    To view this example as a custom track in the Genome
		    Browser, copy the text and paste it into the browser annotation track text box. 
		    
browser position chr19:59302001-59304701
browser hide all
browser pack refGene encodeRegions
browser full altGraph
#	300 base wide bar graph, autoScale is on by default == graphing
#	limits will dynamically change to always show full range of data
#	in viewing window, priority = 20 positions this as the second graph
#	Note, zero-relative, half-open coordinate system in use for bedGraph format
track type=bedGraph name="BedGraph Format" description="BedGraph format" 
    visibility=full color=200,100,0 altColor=0,100,200 priority=20
chr19 59302000 59302300 -1.0
chr19 59302300 59302600 -0.75
chr19 59302600 59302900 -0.50
chr19 59302900 59303200 -0.25
chr19 59303200 59303500 0.0
chr19 59303500 59303800 0.25
chr19 59303800 59304100 0.50
chr19 59304100 59304400 0.75
chr19 59304400 59304700 1.00
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