NAME

      psrose - Plot (length, azimuth) as windrose diagram or polar histogram
      (sector or rose diagram).

SYNOPSIS

      psrose file [ -Asector_width[r] ] [ -Btickinfo ] [ -C[mode-file] ] [
      -Eazimuth/elevation ] [ -Gfill ] [ -H[nrec] ] [ -I ] [ -K ] [
      -M[parameters ] [ -O ] [ -P ] [ -Rr0/r1/az_0/az_1 ] [ -Sradial_scale[n]
      ] [ -T ] [ -U[/dx/dy/][label] ] [ -V ] [ -Wpen ] [ -Xx-shift ] [ -Yy-
      shift ] [ -Zscale ] [ -ccopies ] [ -: ] [ -bi[s][n] ]

DESCRIPTION

      psrose reads (length,azimuth) pairs from file [or standard input] and
      generates PostScript code that will plot a windrose diagram.
      Optionally (with -A), polar histograms may be drawn (sector diagram or
      rose diagram).  Options include full circle and half circle plots.
      The PostScript code is written to standard output.

      file Name of ASCII [or binary, see -b] data file.  If no file is
           given, psrose will read standard input.

OPTIONS

      No space between the option flag and the associated arguments.

      -A   Gives the sector width in degrees for sector and rose diagram.
           [Default 0 means windrose diagram].  Append r to draw rose
           diagram instead of sector diagram.

      -B   Sets map boundary tickmark intervals. See psbasemap for details.
           Remember that "x" here is radial distance and "y" is azimuth.
           The ylabel may be used to plot a figure caption.

      -C   Plot vectors showing the principal directions given in the modes
           file.  If no file is given, compute and plot mean direction.

      -E   Sets the viewpoint's azimuth and elevation [180/90]

      -G   Selects shade or color for sector infill [Default is no fill].
           Specify the shade (0-255) or color (r/g/b, each in 0-255).

      -H   Input file(s) has Header record(s).  Number of header records can
           be changed by editing your .gmtdefaults file.  If used, GMT
           default is 1 header record.

      -I   Inquire.  Computes statistics needed to specify useful -R.  No
           plot is generated.

      -K   More PostScript code will be appended later [Default terminates
           the plot system].


      -M   Specify new arrow attributes tailwidth/headlength/headwidth/r/g/b
           to change the appearance of arrows (Only if -C is set). [Default
           is 0.03i/0.12i/0.1i/0/0/0].

      -O   Selects Overlay plot mode [Default initializes a new plot
           system].

      -P   Selects Portrait plotting mode [GMT Default is Landscape, see
           gmtdefaults to change this].

      -R   Specifies the 'region' of interest in (r,azimuth) space.  r0 is
           0, r1 is max length in units.  For azimuth, specify -90/90 for
           half circle plot or 0/360 for full circle.

      -S   Specifies radius of circle in inch.  Append n to normalize input
           radii to go from 0 to 1.

      -T   Specifies that the input data is orientation data (has a 180
           degree ambiguity) instead of true 0-360 degree directions
           [Default].

      -U   Draw Unix System time stamp on plot.  User may specify where the
           lower left corner of the stamp should fall on the page relative
           to lower left corner of plot in inch [Default is (-0.75i/-
           0.75i)].  Optionally, append a label, or c (which will plot the
           command string.)

      -V   Selects verbose mode, which will send progress reports to stderr
           [Default runs "silently"].

      -W   Set pen attributes for sector outline or rose plot.  [Default is
           no outline].

      -X -Y
           Shift origin of plot by (x-shift,y-shift) inch  [Default is
           (a1i,a1i) for new plots, (0,0) for overlays].  Prepend a for
           absolute coordinates; the default (r) will reset plot origin.

      -Z   Multiply the data radii by scale.  E.g., use -Z0.001 to convert
           your data from m to km [Default is no scaling].

      -c   Specifies the number of plot copies. [Default is 1]

      -:   Input file has (azimuth,radius) pairs rather than the expected
           (radius,azimuth).

      -bi  Selects binary input.  Append s for single precision [Default is
           double].  Append n for the number of columns in the binary
           file(s).  [Default is 2 input columns].

EXAMPLES

      To plot a half circle rose diagram of the data in the file
      fault_segments.az_r (containing pairs of (azimuth, length in meters),
      using a 10 degree bin sector width, on a circle of radius = 3 inch,
      grid going out to radius = 150 km in steps of 25 km with a 30 degree
      sector interval, radial direction annotated every 50 km, using a light
      blue shading (200/240/255) outlined by a solid red pen (width = 0.75
      points), draw the mean azimuth, and shown in Portrait orientation,
      try:

      psrose fault_segments.az_r -R0/150/-90/90 -B50g25:"Fault
      length":/g30:."Rose diagram": -S3i -A10r -G200/240/255 -W0.75p/255/0/0
      -Z0.001 -C -P -T -: | lpr

      To plot a full circle wind rose diagram of the data in the file
      lines.r_az, on a circle of radius = 2 inch, grid going out to radius =
      500 units in steps of 100 with a 45 degree sector interval, using a
      solid pen (width = 0.5 point), and shown in landscape [Default]
      orientation with UNIX timestamp and command line plotted, try:

      psrose lines.az_r -R0/500/0/360 -S2i -Bg100/g45:."Windrose diagram":
      -W0.5p -Uc | lpr

BUGS

      No default radial scale and grid settings for polar histograms.  User
      must run psrose -I to find max length in binned data set.

SEE ALSO

      gmt, gmtdefaults, pshistogram