Usage: sga2wig [options] [<] <SGA file|stdin>
      - version 1.6.0
      where options are:
  		 -d|--debug                Produce Debug information
  		 -h|--help                 Show this Help text
  		 -i|--db <path>            Use <path> to locate the chr_NC_gi and chr_size files
  		                           [default is: $HOME/db/genome]
  		 -o|--format <0|1>         Set Wiggle Track data format: variableStep[def=0]/fixedStep[1]
  		 -n|--chrnb  <int>         Chromosome number [def: 0 (all chromosomes)]
  		 -b|--start  <int>         Chromosome start [def: -1 (entire chromosome)]
  		 -e|--end    <int>         Chromosome end [def: -1 (entire chromosome)]
  		 -c|--coff   <int>         Count cut-off for the SGA input file [def=99999]
  		 -s|--span   <int>         Wiggle Track Span(/stepInterval) parameter [def=150]
  		                           For fixedStep data format, it defines the step parameter
  		 -f|--norm   <int>         Normalization factor for total tag counts within step intervals [def=0]
  		                           This option is only valid for fixedStep data format
  		 --peakf                   Indicate that the The SGA input file represents a peak file
  		                           [i.e. coordinates are peak centers]
  		                           In such case, the span range begins upstream of [span=]150 bp
  		                           chromosome position specified, and ends [span=]150 bp downstream
  		 --name <name>             Set name for track name field [def. name=SGA-feature]
  		 --desc <desc>             Set track description field [def. desc="ChIP-Seq Custom data"]
  		 --color <col>             Define the track color in comma-separated RGB values [def. 100,100,100]
  		 --autoscale  <on|off>     Data viewing paramenter: set auto-scale to UCSC data view [def=OFF]
  		 --always0    <on|off>     Data viewing paramenter: always include zero [def=OFF]
  		 --wfunction  <func>       Data viewing paramenter: windowing function [def=mean+whiskers|maximum|mean|minimum]
  		 --smoothing  <grade>      Data viewing paramenter: smoothing window [def=OFF[0], <grade>=0,2..16]
  		 --visibility <mode>       Display mode: [def=full|dense|hide]

	Convert SGA format into Wiggle Track format (WIG).
	WIG format is line-oriented, and is composed of declaration lines and data lines.

	- variableStep is for data with irregular intervals between new data points.
	  It begins with a declaration line and is followed by two columns containing chromosome positions and data values:

	  variableStep  chrom=chrN  [span=windowSize]
	  chromStartA  dataValueA
	  chromStartB  dataValueB
	  ... etc ...  ... etc ...

	- fixedStep is for data with regular intervals between new data values.
	  It begins with a declaration line and is followed by a single column of data values:

	  fixedStep  chrom=chrN  start=position  step=stepInterval  [span=windowSize = stepInterval]
	  dataValue1
	  dataValue2
	  ... etc ...

