public String toStringMatrix(){
  StringBuffer result;
  String[][] cells;
  int i;
  int n;
  String line;
  String title;
  String generated;
  result=new StringBuffer();
  cells=toArray();
  generated="# generated by WEKA " + Version.VERSION + "\n";
  result.append("\n");
  result.append("##################\n");
  result.append("# file: plot.dat #\n");
  result.append("##################\n");
  result.append(generated);
  result.append("# contains the data for the plot\n");
  result.append("\n");
  result.append("# key for the x-axis\n");
  for (i=1; i < cells.length - 1; i++)   result.append("# " + i + " - "+ cells[i][0]+ "\n");
  result.append("\n");
  result.append("# data for the plot\n");
  for (i=1; i < cells.length - 1; i++) {
    result.append(Integer.toString(i));
    for (n=1; n < cells[i].length; n++) {
      if (isSignificance(n))       continue;
      result.append(" ");
      result.append(Utils.quote(cells[i][n]));
    }
    result.append("\n");
  }
  result.append("#######\n");
  result.append("# end #\n");
  result.append("#######\n");
  result.append("\n");
  result.append("##################\n");
  result.append("# file: plot.scr #\n");
  result.append("##################\n");
  result.append(generated);
  result.append("# script to plot the data\n");
  result.append("\n");
  result.append("# display it in a window:\n");
  result.append("set terminal x11\n");
  result.append("set output\n");
  result.append("\n");
  result.append("# to display all data rows:\n");
  result.append("set xrange [0:" + ((cells.length - 2) + 1) + "]\n");
  result.append("\n");
  result.append("# axis labels, e.g.:\n");
  result.append("#set xlabel \"Datasets\"\n");
  result.append("#set ylabel \"Accuracy in %\"\n");
  result.append("\n");
  result.append("# the plot commands\n");
  n=1;
  i=0;
  while (i < cells[0].length - 1) {
    i++;
    if (isSignificance(i))     continue;
    n++;
    if (i == 1)     line="plot";
 else     line="replot";
    line+=" \"plot.dat\"";
    title="title \"" + cells[0][i] + "\"";
    line+=" using 1:" + n;
    if (getShowStdDev()) {
      n++;
      i++;
      line+=":" + n;
    }
    line+=" with";
    if (getShowStdDev())     line+=" yerrorbars";
 else     line+=" lines";
    line+=" " + title;
    result.append(line + "\n");
  }
  result.append("\n");
  result.append("# generate ps:\n");
  result.append("#set terminal postscript\n");
  result.append("#set output \"plot.ps\"\n");
  result.append("#replot\n");
  result.append("\n");
  result.append("# generate png:\n");
  result.append("#set terminal png size 800,600\n");
  result.append("#set output \"plot.png\"\n");
  result.append("#replot\n");
  result.append("\n");
  result.append("# wait for user to hit <Return>\n");
  result.append("pause -1\n");
  result.append("#######\n");
  result.append("# end #\n");
  result.append("#######\n");
  return result.toString();
}

public String toStringMatrix ( ) { StringBuffer result ; String [ ] [ ] cells ; int i ; int n ; String line ; String title ; String generated ; result = new StringBuffer ( ) ; cells = toArray ( ) ; generated = "# generated by WEKA " + Version . VERSION + "\n" ; result . append ( "\n" ) ; result . append ( "##################\n" ) ; result . append ( "# file: plot.dat #\n" ) ; result . append ( "##################\n" ) ; result . append ( generated ) ; result . append ( "# contains the data for the plot\n" ) ; result . append ( "\n" ) ; result . append ( "# key for the x-axis\n" ) ; for ( i = 1 ; i < cells . length - 1 ; i ++ ) result . append ( "# " + i + " - " + cells [ i ] [ 0 ] + "\n" ) ; result . append ( "\n" ) ; result . append ( "# data for the plot\n" ) ; for ( i = 1 ; i < cells . length - 1 ; i ++ ) { result . append ( Integer . toString ( i ) ) ; for ( n = 1 ; n < cells [ i ] . length ; n ++ ) { if ( isSignificance ( n ) ) continue ; result . append ( " " ) ; result . append ( Utils . quote ( cells [ i ] [ n ] ) ) ; } result . append ( "\n" ) ; } result . append ( "#######\n" ) ; result . append ( "# end #\n" ) ; result . append ( "#######\n" ) ; result . append ( "\n" ) ; result . append ( "##################\n" ) ; result . append ( "# file: plot.scr #\n" ) ; result . append ( "##################\n" ) ; result . append ( generated ) ; result . append ( "# script to plot the data\n" ) ; result . append ( "\n" ) ; result . append ( "# display it in a window:\n" ) ; result . append ( "set terminal x11\n" ) ; result . append ( "set output\n" ) ; result . append ( "\n" ) ; result . append ( "# to display all data rows:\n" ) ; result . append ( "set xrange [0:" + ( ( cells . length - 2 ) + 1 ) + "]\n" ) ; result . append ( "\n" ) ; result . append ( "# axis labels, e.g.:\n" ) ; result . append ( "#set xlabel \"Datasets\"\n" ) ; result . append ( "#set ylabel \"Accuracy in %\"\n" ) ; result . append ( "\n" ) ; result . append ( "# the plot commands\n" ) ; n = 1 ; i = 0 ; while ( i < cells [ 0 ] . length - 1 ) { i ++ ; if ( isSignificance ( i ) ) continue ; n ++ ; if ( i == 1 ) line = "plot" ; else line = "replot" ; line += " \"plot.dat\"" ; title = "title \"" + cells [ 0 ] [ i ] + "\"" ; line += " using 1:" + n ; if ( getShowStdDev ( ) ) { n ++ ; i ++ ; line += ":" + n ; } line += " with" ; if ( getShowStdDev ( ) ) line += " yerrorbars" ; else line += " lines" ; line += " " + title ; result . append ( line + "\n" ) ; } result . append ( "\n" ) ; result . append ( "# generate ps:\n" ) ; result . append ( "#set terminal postscript\n" ) ; result . append ( "#set output \"plot.ps\"\n" ) ; result . append ( "#replot\n" ) ; result . append ( "\n" ) ; result . append ( "# generate png:\n" ) ; result . append ( "#set terminal png size 800,600\n" ) ; result . append ( "#set output \"plot.png\"\n" ) ; result . append ( "#replot\n" ) ; result . append ( "\n" ) ; result . append ( "# wait for user to hit <Return>\n" ) ; result . append ( "pause -1\n" ) ; result . append ( "#######\n" ) ; result . append ( "# end #\n" ) ; result . append ( "#######\n" ) ; return result . toString ( ) ; }
returns the matrix in csv format .
