Class: Numo::Gnuplot::PlotData

Inherits:
Object
  • Object
show all
Defined in:
lib/numo/gnuplot.rb

Direct Known Subclasses

ImageData, SPlotRecord

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(*data) ⇒ PlotData

Returns a new instance of PlotData.


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# File 'lib/numo/gnuplot.rb', line 828

def initialize(*data)
  if data.empty?
    raise ArgumentError,"no data"
  end
  @data = data.map{|a| a.respond_to?(:flatten) ? a.flatten : a}
  @n = @data.map{|a| a.size}.min
  @text = true
end

Class Method Details

.array_shape(a) ⇒ Object


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# File 'lib/numo/gnuplot.rb', line 896

def self.array_shape(a)
  if a.kind_of?(Array)
    is_2d = true
    is_1d = true
    size_min = nil
    a.each do |b|
      if b.kind_of?(Array)
        is_1d = false
        if b.any?{|c| c.kind_of?(Array)}
          is_2d = false
        elsif size_min.nil? || b.size < size_min
          size_min = b.size
        end
      else
        is_2d = false
      end
      break if !is_1d && !is_2d
    end
    if is_1d
      [a.size]
    elsif is_2d
      [a.size, size_min]
    else
      raise GnuplotError, "not suitable Array for data"
    end
  elsif a.respond_to?(:shape)
    a.shape
  elsif PlotItem.is_data(a)
    [a.size]
  else
    raise GnuplotError, "not suitable type for data"
  end
end

.quote_data(v) ⇒ Object


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# File 'lib/numo/gnuplot.rb', line 877

def self.quote_data(v)
  case v
  when Float,Rational
    DATA_FORMAT % v
  when Numeric
    v.to_s
  else
    s = v.to_s.gsub(/\n/,'\n')
    if /^(e|.*[ \t].*)$/ =~ s
      if /"/ =~ s
        raise GnuplotError,"Datastrings cannot include"+
          " double quotation and space simultaneously"
      end
      s = '"'+s+'"'
    end
    s
  end
end

Instance Method Details

#as_array(a) ⇒ Object


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# File 'lib/numo/gnuplot.rb', line 845

def as_array(a)
  case a
  when Numo::NArray,Array
    a
  else
    a.to_a
  end
end

#cmd_strObject


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# File 'lib/numo/gnuplot.rb', line 837

def cmd_str
  if @text
    "'-'"
  else
    "'-' binary record=#{@n} format='%float64'"
  end
end

#data_formatObject


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# File 'lib/numo/gnuplot.rb', line 824

def data_format
  @data_format || DATA_FORMAT
end

#data_strObject


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# File 'lib/numo/gnuplot.rb', line 854

def data_str
  if @text
    s = ""
    @n.times{|i| s << line_str(i)+"\n"}
    s + "e\n"
  elsif defined? Numo::NArray
    m = @data.size
    x = Numo::DFloat.zeros(@n,m)
    m.times{|i| x[true,i] = as_array(@data[i])[0...@n]}
    x.to_string
  else
    s = []
    @n.times{|i| s.concat @data.map{|a| a[i]}}
    s.pack("d*")
  end
end

#line_str(i) ⇒ Object


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# File 'lib/numo/gnuplot.rb', line 871

def line_str(i)
  @data.map do |a|
    PlotData.quote_data(a[i])
  end.join(" ")
end