Class: GrADS::Command

Inherits:
Object
  • Object
show all
Defined in:
lib/grads/command.rb,
lib/grads/lib/makecpt.rb,
lib/grads/lib/colorbar.rb,
lib/grads/lib/save_image.rb,
lib/grads/lib/xcbar_with_ccols.rb

Defined Under Namespace

Classes: DataHandler, Expression, Variable

Constant Summary collapse

COLORBAR_DEFAULT = 
{
  :line=>true,
  :edge=>"triangle",
}

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(*argv, &block) ⇒ Command

Returns a new instance of Command.



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# File 'lib/grads/command.rb', line 108

def initialize (*argv, &block)
  if argv.last.is_a?(Hash)
    options = argv.pop
  else
    options = {}
  end
  if argv.first
    grads_command = argv.first
  else
    grads_command = "grads"
  end
  if options[:batch] 
    grads_command = grads_command + " -b"
  end
  if options[:portrait]
    grads_command += " -p "
  elsif options[:landscape]
    grads_command += " -l "
  else
    grads_command += " -l "
  end
  begin
    @io, @stdout, @stderr = Open3.popen3(grads_command)
  rescue NotImplementedError
    raise NotImplementedError, "system dosen't support Open3.popen3"
  end
  @debug = false
  @log = ""
  @imported = []
  @echoback = false
  @listen = Thread.start {
    Thread.abort_on_exception = true
    begin
      while line = @stderr.gets ### read(1024)
        STDERR << line
        STDERR.flush
      end
    rescue IOError ### @stdout may externally closed
    end
  }
  @io.puts "ECHOBACK_TEST_FOR_RUBY_GRADS"
  while @stdout.gets !~ /Unknown command: ECHOBACK_TEST_FOR_RUBY_GRADS/
  end
  @io.puts "ECHOBACK_TEST_FOR_RUBY_GRADS"
  if @stdout.gets =~ /ga-> ECHOBACK_TEST_FOR_RUBY_GRADS/
    @echoback = true
    @stdout.gets
  else
    @echoback = false
  end
  put "set grads off"
  put "set timelab off"
  if block_given?
    begin
      case block.arity
      when 1
        yield(self)
      when -1, 0
        instance_eval(&block)
      else
        raise "invalid # of block parameters"
      end
    ensure
      self.quit
    end
  end
end

Dynamic Method Handling

This class handles dynamic methods through the method_missing method

#method_missing(id, *argv) ⇒ Object 



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# File 'lib/grads/command.rb', line 178

def method_missing (id, *argv)
  return id, *argv
end

Instance Attribute Details

#log ⇒ Object (readonly)

Returns the value of attribute log.



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# File 'lib/grads/command.rb', line 176

def log
  @log
end

Instance Method Details

#__template__(d, sd, *args, &block) ⇒ Object 



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# File 'lib/grads/command.rb', line 560

def __template__ (d, sd, *args, &block)
  if args.last.is_a?(Hash)
    opts = args.pop
  else
    opts = {}
  end
  args = args.map{|v| CA_FLOAT(v) }
  dataio   = Tempfile.open("CA_GrADS_", ".")
  dataname = dataio.path
  datactl  = dataname + ".ctl"
  if sd
    result   = q :file, sd.file_id
    ctlfile  = subwrd(sublin(result, 2), 2)
    ctl = GrADS::Gridded.new(ctlfile)
  else
    ref = args.first
    ctl = GrADS::Gridded::Writer.new
    case d
    when 2
      if ref.rank == 2
        ctl.define {
          tdef "1 linear 0z01jan2000 1dy"
          zdef "1 linear 1 1"
          ydef ref.dim0, "linear 1 1"
          xdef ref.dim1, "linear 1 1"
        }
      else
        ctl.define {
          tdef ref.dim0, "linear 0z01jan2000 1dy"
          zdef "1 linear 1 1"
          ydef ref.dim1, "linear 1 1"
          xdef ref.dim2, "linear 1 1"
        }
      end
    when 3
      if ref.rank == 3
        ctl.define {
          tdef "1 linear 0z01jan2000 1dy"
          zdef ref.dim0, "linear 1 1"
          ydef ref.dim1, "linear 1 1"
          xdef ref.dim2, "linear 1 1"
        }
      else
        ctl.define {
          tdef ref.dim0, "linear 0z01jan2000 1dy"
          zdef ref.dim1, "linear 1 1"
          ydef ref.dim2, "linear 1 1"
          xdef ref.dim3, "linear 1 1"
        }
      end
    end
  end
  ctl.define {
    if opts[:undef]
      undef! opts[:undef]
    else
      undef! 1e30
    end
  }
  if block
    ctl.define(&block)
  end
  begin
    names = []
    ctl.template(datactl) do
      dset dataname
      args.each_with_index do |arg, i|
        names << ( name = "tmpvar#{i}" )
        case d
        when 2
          var2d(name, arg)
        when 3
          var3d(name, arg)
        end
      end
    end
    ss = open(datactl)
    vars = []
    names.each do |name|
      vars << define(name, ss.send(name))
    end
    return vars
  ensure
    dataio.close
    File.unlink(datactl)
  end
end

#_guess_colorbar_position(cnum) ⇒ Object 



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# File 'lib/grads/lib/colorbar.rb', line 154

def _guess_colorbar_position (cnum)

  out = q :gxinfo

  io = StringIO.new(out)
  io.gets
  xsize, ysize = *io.gets.split(/\s+/).values_at(3,5).map{|v| v.to_i}
  xlmin, xlmax = *io.gets.split(/\s+/).values_at(3,5).map{|v| v.to_i}
  ylmin, ylmax = *io.gets.split(/\s+/).values_at(3,5).map{|v| v.to_i}
  xlwid = xlmax - xlmin
  ylwid = ylmax - ylmin

  if ylmin < 0.6 or xsize-xlmax > 1.5
    direction = 'vertical'
    xmin = xlmax + ( xsize - xlmax ) / 2 - 0.4
    xmax = xmin + 0.2
    y1wid = 0.5
    if y1wid * cnum > ysize * 0.8 
      y1wid = ysize * 0.8 / cnum
    end
    ymin = ysize / 2 - y1wid * cnum / 2
    ymax = ysize / 2 + y1wid * cnum / 2
  else
    direction = 'horizontal'
    ymin = ylmin / 2
    ymax = ymin + 0.2
    x1wid = 0.8
    if x1wid * cnum > xsize * 0.8
      x1wid = xsize * 0.8 / cnum
    end
    xmin = xsize / 2 - x1wid * cnum / 2
    xmax = xsize / 2 + x1wid * cnum / 2
  end

  return xmin, xmax, ymin, ymax, direction
end

#_hsv2rgb(h, s, v) ⇒ Object 



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# File 'lib/grads/lib/makecpt.rb', line 141

def _hsv2rgb(h, s, v)
  h = h.to_f
  s = s.to_f
  v = v.to_f

  if s == 0 and h == 0
    v = (255*v).floor
    return v, v, v
  end

  if h == 360
    h = 0
  end

  h /= 60.0
  i = h.floor.to_i
  f = h - i

  p = (255*v*(1 - s)).floor
  q = (255*v*(1 - s*f)).floor
  t = (255*v*(1 - s*(1 - f))).floor
  v = (255*v).floor

  case i
  when 0
    return v, t, p
  when 1
    return q, v, p
  when 2
    return p, v, t
  when 3
    return p, q, v
  when 4
    return t, p, v
  when 5
    return v, p, q
  end
end

#clear(*argv) ⇒ Object Also known as: c 



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# File 'lib/grads/command.rb', line 416

def clear (*argv)
  @ccols = nil
  @clevs = nil
  put "clear " + argv.join(" ")
end

#close(dh) ⇒ Object 



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# File 'lib/grads/command.rb', line 267

def close (dh)
  file_id = dh.file_id
  put "close #{file_id}"
end

#colorbar(opt = {}) ⇒ Object 



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# File 'lib/grads/lib/colorbar.rb', line 23

def colorbar (opt={})
  import :color, :xcbar
  opt = COLORBAR_DEFAULT.clone.update(opt)
  if opt[:color]
    if opt[:color] == :clevs
      arg = "-levs " + opt[:clevs].join(" ")
    else
      arg = [opt[:color]].flatten.join(" ")
    end
    if opt[:kind]
      arg += " -kind " + opt[:kind]
    end
    out = color arg
    clevs = ccols = nil
    out.split(/\n/).each do |line|
      case line 
      when /clevs/
        clevs = line.split(/ +/)[1..-1]
      when /ccols/
        ccols = line.split(/ +/)[1..-1]      
      end
    end
  elsif opt[:clevs] and opt[:ccols]
    clevs = opt[:clevs]
    ccols = opt[:ccols]
  else
    if @clevs and @ccols
      clevs = @clevs.clone
      ccols = @ccols.clone
    else
      out = q :shades
      io = StringIO.new(out)
      io.gets
      clevs = []
      ccols = []
      while line = io.gets
        col, lev = *line.split(/\s+/)[0..1]
        ccols << col.to_i
        if lev != "<"
          clevs << lev.to_f
        end
      end
    end
  end
  set_clevs *clevs
  set_ccols *ccols

  arg = ""
  if opt[:pos]
    arg << opt[:pos].join(" ") + " "
    xmin, xmax, ymin, ymax = *opt[:pos]
    if not opt[:dir]
      if ( xmax - xmin ) > ( ymax - ymin )
        opt[:dir] = "horizontal"
      else
        opt[:dir] = "virtical"
      end
    end
  else
    cnum = ccols.size
    xmin, xmax, ymin, ymax, opt[:dir] = *_guess_colorbar_position(cnum)
  end

  levcol = []
  i = 0
  clevs.each_index do 
    levcol << ccols[i]
    levcol << clevs[i]
    i += 1
  end
  levcol << ccols[i]
  arg << "-levcol #{levcol.join(' ')} "

  if opt[:tics]
    if opt[:tics][0]
      arg << "-fs #{opt[:tics][0]} "
    end
    if opt[:tics][1]
      arg << "-fo #{opt[:tics][1]} "
    end
  end

  if opt[:font]
    if opt[:font][0]
      arg << "-fw #{opt[:font][0]} "
    end
    if opt[:font][1]
      arg << "-fh #{opt[:font][1]} "
    end
    if opt[:font][2]
      arg << "-ft #{opt[:font][2]} "
    end
  end

  if opt[:edge]
    arg << "-edge #{opt[:edge]} "
  end

  if opt[:dir]
    arg << "-dir #{opt[:dir]} "
  end

  if opt[:line]
    arg << "-line on"
  else
    arg << "-line off"
  end
  xcbar arg

  if opt[:title]
    case opt[:title]
    when String
      text = opt[:title]
      ts = 0.2
    else
      text = opt[:title][0]
      ts   = opt[:title][1] || 0.2
    end
    if opt[:dir] == "horizontal" or opt[:dir] == "h"
      set :strsiz, ts
      set :string, 1, "bc", 2
      draw :string, (xmin+xmax)/2.0, ymax+(ymax-ymin)*0.5, text
    else
      set :strsiz, ts
      set :string, 1, "bc", 2, 90
      draw :string, xmin-(xmax-xmin)*0.5, (ymin+ymax)/2.0, text
    end
  end

end

#debug_off ⇒ Object 



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# File 'lib/grads/command.rb', line 238

def debug_off
  @debug = false
end

#debug_on ⇒ Object 



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# File 'lib/grads/command.rb', line 234

def debug_on
  @debug = true
end

#define(name, expr) ⇒ Object 



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# File 'lib/grads/command.rb', line 359

def define (name, expr)
  put "define #{name} = " + expr
  return Variable.new(nil, name)
end

#display(*argv) ⇒ Object Also known as: d 



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# File 'lib/grads/command.rb', line 351

def display (*argv)
  if argv.first.is_a?(Array)
    put "display " + argv.first.map{|v| "("+v.to_s+")" }.join(";")
  else
    put "display " + argv.join(" ")
  end
end

#draw(*argv) ⇒ Object 



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# File 'lib/grads/command.rb', line 382

def draw (*argv)
  put "draw " + argv.flatten.join(" ")
end

#enable(id, *argv) ⇒ Object 



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# File 'lib/grads/command.rb', line 368

def enable (id, *argv)
  case id.to_s
  when "print"
    begin
      put "enable print " + argv.join(" ")
      yield
    ensure
      put "disable print"
    end
  else
    put "enable #{id} " + argv.join(" ")      
  end
end

#eval(expr) ⇒ Object 



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# File 'lib/grads/command.rb', line 364

def eval (expr)
  put expr.to_s
end

#exec(name, *argv) ⇒ Object 



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# File 'lib/grads/command.rb', line 322

def exec (name, *argv)
  put "exec #{name} " + argv.flatten.join(" ")
end

#exec_string(definition, *argv) ⇒ Object 



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# File 'lib/grads/command.rb', line 326

def exec_string (definition, *argv)
  io = Tempfile.open("CA_GrADS_", ".")
  io.write definition 
  io.puts
  io.flush
  return exec(io.path, *argv)
ensure
  io.close
end

#get_level ⇒ Object 



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# File 'lib/grads/command.rb', line 464

def get_level
  return subwrd(sublin(query("dims"),4),6).to_f    
end

#get_mouse_click(trans = nil) ⇒ Object 



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# File 'lib/grads/command.rb', line 478

def get_mouse_click (trans = nil)
  list = query("pos").split(/\s+/)
  button = list[4].to_i
  x, y = list[2].to_f, list[3].to_f
  if trans
    list = query(trans, x, y).split(/\s+/)
    x, y = list[2].to_f, list[5].to_f
  end
  return x, y, button
end

#get_time ⇒ Object 



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# File 'lib/grads/command.rb', line 445

def get_time
  list = query("time").split(/\s+/)
  if list[2] == list[4]
    return DateTime.parse(list[2].sub(/Z/," "))
  else
    return DateTime.parse(list[2].sub(/Z/," "))..DateTime.parse(list[4].sub(/Z/," "))
  end
end

#get_time_end ⇒ Object 



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# File 'lib/grads/command.rb', line 459

def get_time_end
  list = query("time").split(/\s+/)
  return DateTime.parse(list[4].sub(/Z/," "))
end

#get_time_start ⇒ Object 



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# File 'lib/grads/command.rb', line 454

def get_time_start
  list = query("time").split(/\s+/)
  return DateTime.parse(list[2].sub(/Z/," "))
end

#get_value(*argv) ⇒ Object 



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# File 'lib/grads/command.rb', line 468

def get_value (*argv)
  var = argv.shift
  if argv.empty?
    list = query(:defval, var, 0, 0).split(/\s+/)
  else
    list = query(:defval, var, *argv).split(/\s+/)
  end
  return list[2].to_f
end

#gr2w(fi, fj) ⇒ Object 



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# File 'lib/grads/command.rb', line 504

def gr2w (fi, fj)
  return transform(:gr2w, fi, fj)
end

#gr2xy(fi, fj) ⇒ Object 



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# File 'lib/grads/command.rb', line 508

def gr2xy (fi, fj)
  return transform(:gr2xy, fi, fj)
end

#import(*args) ⇒ Object 



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# File 'lib/grads/command.rb', line 530

def import (*args)
  args.each do |name|
    if @imported.include?(name)
      next
    end
    self.class.module_eval %{
      def #{name} (*argv)
        put "#{name} " + argv.join(" ")
      end
    }
    @imported.push name
  end
end

#imported?(arg) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/grads/command.rb', line 544

def imported? (arg)
  return @imported.include?(arg)
end

#makecpt(*args) ⇒ Object 



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# File 'lib/grads/lib/makecpt.rb', line 76

def makecpt (*args)
  io = IO::popen("makecpt #{args.join(' ')}", "r")
  while line = io.gets
    if line =~ /COLOR_MODEL\s*=\s*\+?(HSV|RGB)/
      model = $1
      break
    end
  end
  bgrb = nil
  frgb = nil
  list = []
  while line = io.gets
    case line
    when /\A[\#N]/
      next
    when /\AB\s/
      brgb = line.split(/\s+/)[1..3].map{|v| v.to_f}
    when /\AF\s/
      frgb = line.split(/\s+/)[1..3].map{|v| v.to_f}
    else
      list << line.split(/\s+/)[0..3].map{|v| v.to_f}
      last = line.split(/\s+/)[4..7].map{|v| v.to_f}
    end
  end
  list << last
  io.close
  clevs = []
  ccols = []
  ic = 16
  if brgb
    if model == "HSV"
      set :rgb, ic, *_hsv2rgb(*brgb)
    else
      set :rgb, ic, *brgb
    end
    ccols << ic
  else
    ccols << 0
  end
  ic += 1
  list.each_with_index do |(v,r,g,b),i|
    if model == "HSV"
      set :rgb, i+ic, *_hsv2rgb(r, g, b)
    else
      set :rgb, i+ic, r, g, b
    end
    clevs << v
    if ! frgb and i == list.size - 1 
      ccols << 0
    else
      ccols << i+ic
    end
  end
  ic += list.size - 1
  if frgb
    if model == "HSV"
      set :rgb, ic, *_hsv2rgb(*frgb)
    else
      set :rgb, ic, *frgb
    end
  end
  set_clevs *clevs
  set_ccols *ccols
end

#open(*argv) ⇒ Object 



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# File 'lib/grads/command.rb', line 251

def open (*argv)
  text = put "open " + argv.join(" ")
  file_id = nil
  text.each_line do |line|
    if line =~ /is open as file/
      file_id = subwrd(line, 8).to_i
      break
    end
  end
  if file_id 
    return DataHandler.new(file_id)
  else
    raise "failed to open file #{argv.first}"
  end
end

#pause ⇒ Object 



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# File 'lib/grads/command.rb', line 548

def pause
  get_mouse_click
end

#put(*args) ⇒ Object 



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# File 'lib/grads/command.rb', line 192

def put (*args)
  command = args.join("\n")
  @log << command << "\n"
  if @debug
    STDERR.puts "ga-> " + command 
  end
  thread = Thread.start {
    begin
      size = command.size
      s = 0
      while s < size
        s += @io.write(command[s, 1024])
      end
      @io.puts
      @io.puts "SIGNAL_FOR_RUBY_GRADS"
      @io.flush
    rescue Errno::EPIPE
    end
  }
  output = ""
  while line = @stdout.gets
    if @echoback and line =~ /^ga->\s+/
      next
    else
      line.sub!(/^ga->\s+/,'')
    end
    case line
    when /SIGNAL_FOR_RUBY_GRADS/
      STDERR.print(output) if @debug and not output.empty?
      return output.chomp
    when /^(\w+) error: (.*?) /
      output << line
      STDERR.print output
      raise "GRADS Error"
    else
      output << line
    end
  end
ensure
  thread.join
end

#quit ⇒ Object Also known as: exit 



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# File 'lib/grads/command.rb', line 182

def quit
  put("quit")
  @io.close
  @listen.join
  @stdout.close
  @stderr.close
end

#redraw(*argv) ⇒ Object 



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# File 'lib/grads/command.rb', line 386

def redraw (*argv)
  put "redraw " + argv.flatten.join(" ")
end

#save_image(filename, size = 640, dpi = 300) ⇒ Object 



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# File 'lib/grads/lib/save_image.rb', line 5

def save_image (filename, size=640, dpi=300)
  io = Tempfile.open("CA_GrADS_", ".")
  basename = io.path
  enable(:print, basename) {
    print
  }
  case filename
  when /\.eps/
    system %{
      gxeps -R -i #{basename} -o #{filename}
    }
  else
    system %{
      gxeps -R -i #{basename} -o #{basename}.eps
      convert -density #{dpi} -resize #{size} +antialias #{basename}.eps #{filename}
      rm -f #{basename}.eps
    }
  end
  io.close
end

#scan(ctltext) ⇒ Object 



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# File 'lib/grads/command.rb', line 304

def scan (ctltext)
  io = Tempfile.open("CA_GrADS_", ".")
  io.write ctltext
  io.flush
  return open(io.path)
ensure
  io.close
end

#script(name, definition) ⇒ Object 



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# File 'lib/grads/command.rb', line 336

def script (name, definition)
  io = Tempfile.new("CA_GrADS_", ".")
  io.write(definition)
  io.flush
  instance_eval %{
    def #{name} (*args)
      run "#{io.path}", *args
    end
  }
end

#sdfopen(*argv) ⇒ Object 



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# File 'lib/grads/command.rb', line 288

def sdfopen (*argv)
  text = put "sdfopen " + argv.join(" ")
  file_id = nil
  text.each_line do |line|
    if line =~ /is open as file/
      file_id = subwrd(line, 8).to_i
      break
    end
  end
  if file_id 
    return DataHandler.new(file_id)
  else
    raise "failed to open file #{argv.first}"
  end
end

#set(*argv) ⇒ Object 



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# File 'lib/grads/command.rb', line 347

def set (*argv)
  put "set " + argv.flatten.join(" ")
end

#set_ccols(*argv) ⇒ Object 



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# File 'lib/grads/command.rb', line 525

def set_ccols (*argv)
  @ccols = argv
  set :ccols, *argv
end

#set_clevs(*argv) ⇒ Object 



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# File 'lib/grads/command.rb', line 520

def set_clevs (*argv)
  @clevs = argv
  set :clevs, *argv
end

#set_time(*argv) ⇒ Object 



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# File 'lib/grads/command.rb', line 426

def set_time (*argv)
  list = []
  argv.each do |time|
    timestr = nil
    case time
    when DateTime, Time
      timestr = time.strftime("%H:%Mz%d%b%Y")    
    when Date
      timestr = time.strftime("%d%b%Y")
    when String
      timestr = time
    else
      raise "unknown time variable #{time.inspect}"
    end
    list << timestr
  end
  set :time, *list
end

#setcpt(file) ⇒ Object

— makecpt(“GMT’s makecpt arguments as String”)

Sets clevs and ccols from the output of piped makecpt command.

The continuous color pallet generated with makecpt option “-Z” is not supported.



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# File 'lib/grads/lib/makecpt.rb', line 11

def setcpt (file)
  io = Kernel::open(file)
  while line = io.gets
    if line =~ /COLOR_MODEL\s*=\s*\+?(HSV|RGB)/
      model = $1
      break
    end
  end
  bgrb = nil
  frgb = nil
  list = []
  while line = io.gets
    case line
    when /\A[\#N]/
      next
    when /\AB\s/
      brgb = line.split(/\s+/)[1..3].map{|v| v.to_f}
    when /\AF\s/
      frgb = line.split(/\s+/)[1..3].map{|v| v.to_f}
    else
      list << line.lstrip.split(/\s+/)[0..3].map{|v| v.to_f}
      last = line.lstrip.split(/\s+/)[4..7].map{|v| v.to_f}
    end
  end
  list << last
  io.close
  clevs = []
  ccols = []
  ic = 16
  if brgb
    if model == "HSV"
      set :rgb, ic, *_hsv2rgb(*brgb)
    else
      set :rgb, ic, *brgb
    end
    ccols << ic
  else
    ccols << 0
  end
  ic += 1
  list.each_with_index do |(v,r,g,b),i|
    if model == "HSV"
      set :rgb, i+ic, *_hsv2rgb(r, g, b)
    else
      set :rgb, i+ic, r, g, b
    end
    clevs << v
    if ! frgb and i == list.size - 1 
      ccols << 0
    else
      ccols << i+ic
    end
  end
  ic += list.size - 1
  if frgb
    if model == "HSV"
      set :rgb, ic, *_hsv2rgb(*frgb)
    else
      set :rgb, ic, *frgb
    end
  end
  set_clevs *clevs
  set_ccols *ccols
end

#sublin(text, n) ⇒ Object 



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# File 'lib/grads/command.rb', line 242

def sublin (text, n)
  return text.split(/\n/)[n-1]
end

#subwrd(text, n) ⇒ Object 



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# File 'lib/grads/command.rb', line 246

def subwrd (text, n)
  wrd = text.strip.split(/\s*\n\s*|\s+/)[n-1]
  return wrd ? wrd.strip : ""
end

#template2d(sd, *args, &block) ⇒ Object 



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# File 'lib/grads/command.rb', line 552

def template2d (sd, *args, &block)
  return __template__(2, sd, *args, &block)
end

#template3d(sd, *args, &block) ⇒ Object 



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# File 'lib/grads/command.rb', line 556

def template3d (sd, *args, &block)
  return __template__(3, sd, *args, &block)
end

#transform(kind, v1, v2) ⇒ Object 



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# File 'lib/grads/command.rb', line 489

def transform (kind, v1, v2)
  result = query(kind, v1, v2)
  r1 = subwrd(result, 3)
  r2 = subwrd(result, 6)
  return r1, r2
end

#w2gr(lat, lon) ⇒ Object 



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# File 'lib/grads/command.rb', line 500

def w2gr (lat, lon)
  return transform(:w2gr, lat, lon)
end

#w2xy(lat, lon) ⇒ Object 



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# File 'lib/grads/command.rb', line 496

def w2xy (lat, lon)
  return transform(:w2xy, lat, lon)
end

#xcbar_with_ccols(clevs, ccols, *xcbaropts) ⇒ Object 



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# File 'lib/grads/lib/xcbar_with_ccols.rb', line 4

def xcbar_with_ccols (clevs, ccols, *xcbaropts)
  import :xcbar
  nlevs = clevs.length
  levcol = []
  nlevs.times do |i|
    levcol << ccols[i]
    levcol << clevs[i]
  end
  levcol << ccols.last
  set :clevs, *clevs
  set :ccols, *ccols
  xcbar *[xcbaropts,"-levcol #{levcol.join(' ')}"].flatten
end

#xcbar_with_color(colorspec, *xcbaropts) ⇒ Object 



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# File 'lib/grads/lib/xcbar_with_ccols.rb', line 18

def xcbar_with_color (colorspec, *xcbaropts)
  import :xcbar, :color
  nlevs = clevs.length
  levcol = []
  nlevs.times do |i|
    levcol << ccols[i]
    levcol << clevs[i]
  end
  levcol << ccols.last
  set :clevs, *clevs
  set :ccols, *ccols
  xcbar *[xcbaropts,"-levcol #{levcol.join(' ')}"].flatten
end

#xdfopen(*argv) ⇒ Object 



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# File 'lib/grads/command.rb', line 272

def xdfopen (*argv)
  text = put "xdfopen " + argv.join(" ")
  file_id = nil
  text.each_line do |line|
    if line =~ /is open as file/
      file_id = subwrd(line, 8).to_i
      break
    end
  end
  if file_id 
    return DataHandler.new(file_id)
  else
    raise "failed to open file #{argv.first}"
  end
end

#xdfscan(ctltext) ⇒ Object 



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# File 'lib/grads/command.rb', line 313

def xdfscan (ctltext)
  io = Tempfile.open("CA_GrADS_", ".")
  io.write ctltext
  io.flush
  return xdfopen(io.path)
ensure
  io.close
end

#xy2gr(x, y) ⇒ Object 



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# File 'lib/grads/command.rb', line 516

def xy2gr (x, y)
  return transform(:xy2gr, x, y)
end

#xy2w(x, y) ⇒ Object 



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# File 'lib/grads/command.rb', line 512

def xy2w (x, y)
  return transform(:xy2w, x, y)
end