Difference between revisions of "Parsing and Plotting Data"

Revision as of 12:54, 13 August 2013

GNUPlot:

Source: 
http://sourceforge.net/projects/gnuplot/files/

CSV to Gnuplot:
http://www.cs.waikato.ac.nz/~fracpete/programming/csv2gnuplot/

Parsing YAML output files into csv:

ruby oscparser.rb output_filename.csv false < ./yml/pawn_0_spiral_2.yml

oscparser.rb

require 'rubygems'
require 'osc-ruby'
require 'yaml'

wait = ARGV[1]			# wait boolean toggles whether the   padded time at the beginning of recorded yml osc action is used
m_time = 0
start_time = 0
final_output = ""
output_filename = ARGV[0]

@messages = YAML.load($stdin)
@start = Time.now

@messages.each_with_index do |m, index|

  if index == 0
    start_time = m[:time]
  end

  if wait=='true'
    m_time = m[:time]
  else
    m_time = m[:time] - start_time
  end

  dt = (@start + m_time) - Time.now
  sleep(dt) if dt > 0
  message = OSC::OSCPacket.messages_from_network(m[:message]).first  
  output = m_time.to_s + ", " + message.address

  @a = message.to_a
  @a.each_with_index do |arg, index|
    #p arg
	output = output + ", " + arg.to_s
  end
  final_output = final_output + "" + output + "\n"
end

File.open(output_filename, 'w') { |file| 
    file.write(final_output) 
}

Import CSV into Processing:

//for importing csv files into a 2d array
//by che-wei wang

String lines[] = loadStrings("list.csv");
String [][] csv;
int csvWidth=0;

//calculate max width of csv file
for (int i=0; i < lines.length; i++) {
  String [] chars=split(lines[i],',');
  if (chars.length>csvWidth){
    csvWidth=chars.length;
  }
}

//create csv array based on # of rows and columns in csv file
csv = new String [lines.length][csvWidth];

//parse values into 2d array
for (int i=0; i < lines.length; i++) {
  String [] temp = new String [lines.length];
  temp= split(lines[i], ',');
  for (int j=0; j < temp.length; j++){
   csv[i][j]=temp[j];
  }
}

//test
println(csv[2][2]); 

Processing Library:

http://www.gicentre.org/utils/#download

Simple Processing Graph:

http://www.learningprocessing.com/examples/chapter-13/example-random-graph/

// Learning Processing
// Daniel Shiffman
// http://www.learningprocessing.com

// Example: a graph of random numbers

float[] vals;

void setup() {
  size(400,200);
  smooth();
  // An array of random values
  vals = new float[width];
  for (int i = 0; i < vals.length; i++) {
    vals[i] = random(height);
  }
}
 

void draw() {

  background(255);
  // Draw lines connecting all points
  for (int i = 0; i < vals.length-1; i++) {
    stroke(0);
    strokeWeight(2);
    line(i,vals[i],i+1,vals[i+1]);
  }
  
  // Slide everything down in the array
  for (int i = 0; i < vals.length-1; i++) {
    vals[i] = vals[i+1]; 
  }
  // Add a new random value
  vals[vals.length-1] = random(height); 

}

Pyxplot:

http://pyxplot.org.uk/examples/index.html

Processing Animated Graph example:

http://answers.oreilly.com/topic/1630-create-animated-graph-visualizations-with-processing/