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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
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