Module: R::PNG

Defined in:
lib/rbbt/util/R/plot.rb

Class Method Summary collapse

Class Method Details

.ggplotPNG(filename, data, script = nil, width = nil, height = nil, options = {}) ⇒ Object 



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# File 'lib/rbbt/util/R/plot.rb', line 82

def self.ggplotPNG(filename, data, script = nil, width = nil, height = nil, options = {})
  width ||= 3
  height ||= 3
  values = []

  sources = [:plot, options[:source]].flatten.compact

  data.each do |k,v|
    v = Array === v ? v : [v]
    next if v == "NA" or v.nil? or v.include? "NA" or v.include? nil
    values = v
    break
  end
  values = [values] unless Array === values
  field_classes = values.collect do |v| 
    case v
    when FalseClass, TrueClass
      "'logical'"
    when Fixnum, Float
      "'numeric'"
    when String
      if v.strip =~ /^[-+]?[\d\.]+$/
        "'numeric'"
      else
        "'character'"
      end
    when Symbol
      "'factor'"
    else
      ":NA"
    end
  end
  options[:R_open] ||= "colClasses=c('character'," + field_classes * ", " + ')'

  data.R <<-EOF, :plot, options
plot = { #{script} }

ggsave('#{filename}', plot, width = #{R.ruby2R width}, height = #{R.ruby2R height})
data = NULL
  EOF
end

.plot(filename, data = nil, script = nil, width = nil, height = nil, options = {}, &block) ⇒ Object 



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# File 'lib/rbbt/util/R/plot.rb', line 124

def self.plot(filename, data = nil, script = nil, width = nil, height = nil, options = {}, &block)
  width ||= 200
  height ||= 200
  values = []

  script ||= ""
  if block_given?
    s = StringIO.new
    class << s
      def method_missing(name, *args)
        name = name.to_s
        if name[-1] == '='
          arg = args.first
          value = if String === arg
                    arg
                  else
                    R.ruby2R arg
                  end
          add("" << name[0..-2] << "=" << value)
        else
          args_strs = []
          args.each do |arg|
            value = if String === arg
                      arg
                    else
                      R.ruby2R arg
                    end
            args_strs << value
          end
          add("" << name << "(" << args_strs * ", " << ")")
        end
      end

      def add(line)
        self.write line << "\n"
      end
    end
    block.call(s)
    s.rewind
    script << "\n" << s.read
  end
  sources = [:plot, options[:source]].flatten.compact
  
  if data
    data.each do |k,v|
      v = Array === v ? v : [v]
      next if v == "NA" or v.nil? or v.include? "NA" or v.include? nil
      values = v
      break
    end 

    values = [values] unless values.nil? or Array === values

    field_classes = values.collect do |v| 
      case v
      when FalseClass, TrueClass
        "'logical'"
      when Fixnum, Float
        "'numeric'"
      when String
        if v.strip =~ /^[-+]?[\d\.]+$/
          "'numeric'"
        else
          "'character'"
        end
      when Symbol
        "'factor'"
      else
        ":NA"
      end
    end

    options[:R_open] ||= "colClasses=c('character'," + field_classes * ", " + ')' if field_classes.any?

    data.R <<-EOF, :plot, options
  png("#{ filename }", #{ width }, #{ height })
  { #{script} }
  dev.off()
  data = NULL
    EOF
  else
    R.run <<-EOF, :plot, options
  png("#{ filename }", #{ width }, #{ height })
  { #{script} }
  dev.off()
    EOF
  end
end